Question 128·Medium·Boundaries
British mathematician Ada Lovelace is best known for her pioneering work on Charles Babbage's proposed Analytical Engine. Her _____ 'Notes' (1843), often considered the first computer program, outlined how the machine could execute looped instructions.
Which choice completes the text so that it conforms to the conventions of Standard English?
For punctuation-boundary questions, first strip the sentence down to its core subject and verb to see what is essential. Then look at the descriptive or extra information in the middle and check how it is already being punctuated later in the sentence (commas, dashes, parentheses). Choose the option that uses matching and consistent punctuation to set off that nonessential information on both sides, and eliminate any choice that starts a punctuation style (like a dash or parenthesis) that never properly closes.
Hints
Find the main sentence around the blank
Ignore the descriptive middle part for a moment. What is the basic subject and verb of the sentence if you remove the words starting at 'titled' and ending at 'program'?
Decide if the middle information is essential or extra
Ask yourself: do we need the title and description of the essay to understand the main action of the sentence, or is that information additional detail?
Match the punctuation that is already there
Look closely at the commas after '(1843)' and 'program'. What do those commas seem to be doing, and what kind of punctuation at the blank would work smoothly with them rather than clashing?
Be consistent with how you set off extra information
For extra (nonessential) information in the middle of a sentence, Standard English usually uses matching punctuation on both sides. Which option before 'titled' works with the commas that come later?
Step-by-step Explanation
Identify the core sentence
Strip away the middle description to see the basic structure:
- Full sentence: 'Her essay _____ titled 'Notes' (1843), often considered the first computer program, outlined how the machine could execute looped instructions.'
- Core idea: 'Her essay ... outlined how the machine could execute looped instructions.'
Everything from 'titled' through 'program' is extra description about the essay, not part of the core subject-verb-meaning.
Recognize this as extra (nonessential) information
The phrase 'titled 'Notes' (1843), often considered the first computer program' tells us more about the essay, but the sentence would still make sense without it:
- 'Her essay outlined how the machine could execute looped instructions.'
Because this middle part is extra, descriptive information, Standard English normally sets it off with punctuation on both sides (like commas, dashes, or parentheses).
Check for matching boundary punctuation
Look at the punctuation that already exists after the descriptive phrase:
- We see commas after '(1843)' and after 'program'.
So the entire descriptive chunk is meant to be inside a pair of commas. That means the blank before 'titled' must also introduce this nonessential information in a way that matches those commas, not with a lone parenthesis or a dash.
Select the option that correctly opens the comma pair
Now test the choices:
- A) 'essay (titled' starts a parenthesis that never properly closes around the whole descriptive phrase.
- B) 'essay—titled' starts with a dash, but the phrase is closed with commas, not a second dash.
- D) 'essay titled' uses no comma to signal that the descriptive phrase is nonessential, even though commas are already used to set off that description.
The only option that correctly opens a comma pair to set off the extra information is C) 'essay, titled'.