Question 29·Medium·Boundaries
Because geologists often work in remote environments, safety protocols must be strictly ______ these measures include checking communication equipment and preparing detailed evacuation plans before each expedition.
Which choice completes the text so that it conforms to the conventions of Standard English?
For sentence-boundary questions with punctuation choices (comma, semicolon, colon, dash), first identify whether the words on each side of the blank form complete clauses. Then decide how those clauses relate: continuation, contrast, or explanation/list. Use that relationship to pick the correct mark: commas (often with conjunctions) for joining, semicolons for closely related independent clauses, colons to introduce explanations or lists after a complete thought, and dashes only when a strong break or interruption is clearly intended. Eliminate any option that creates a comma splice or uses overly dramatic punctuation for a calm, explanatory sentence. Thіѕ quеstiоn іѕ from Aniкο
Hints
Find the clauses
Look at the words before and after the blank. Are both sides complete sentences that could stand on their own?
Think about the relationship
Ask yourself: Is the part after the blank giving a new, unrelated idea, or is it explaining or giving examples of what came right before?
Match relationship to punctuation
Once you know the second part explains or elaborates on the first, think about which punctuation mark is normally used in Standard English to introduce an explanation or list after a complete thought.
Eliminate clear errors
Rule out any option that creates a comma splice or that signals a dramatic pause or interruption that doesn’t match the steady, explanatory tone of the sentence.
Step-by-step Explanation
Identify the main parts of the sentence
Break the sentence into its clauses:
- Dependent clause: "Because geologists often work in remote environments," (this sets up a reason)
- Main clause: "safety protocols must be strictly followed"
- Another full clause: "these measures include checking communication equipment and preparing detailed evacuation plans before each expedition."
The blank comes between the main clause and another complete clause.
Decide how the two complete clauses are related
The first complete clause states a general rule: safety protocols must be strictly followed.
The second complete clause explains what those protocols involve (checking equipment and preparing evacuation plans). So the second clause is an explanation/example of the first, not a contrast and not a separate, unrelated idea.
Recall the punctuation rule for explanations
When a complete sentence is followed by information that explains, defines, or lists examples of that sentence, standard English typically uses punctuation that signals an introduction before the details.
We want punctuation that:
- Comes after a complete thought ("safety protocols must be strictly followed")
- Clearly introduces the explanation that follows ("these measures include...").
Test each answer choice and choose the best fit
Now plug in each option:
- A) followed, → This leaves a comma before another complete clause with no conjunction, creating a comma splice (incorrect).
- B) followed; → A semicolon can join two related complete sentences, but it doesn’t specifically signal that the second clause is explaining or listing details about the first.
- C) followed— → A single dash suggests a sudden break or interruption in thought; that tone doesn’t fit here, and it’s too informal for this straightforward explanation.
- D) followed: → A colon comes after a complete sentence and introduces an explanation or list, which is exactly what "these measures include..." does.
So the choice that correctly follows the conventions of Standard English is D) followed:.