Question 173·Medium·Rhetorical Synthesis
While preparing an article on building materials, a student compiled the following notes:
- Ancient Roman concrete structures such as the Pantheon have remained intact for nearly 2,000 years.
- Engineers at MIT recently analyzed the chemistry of samples of this concrete.
- The team discovered that small white fragments called “lime clasts” allow the concrete to "self-heal": when cracks form, the clasts dissolve, recrystallize, and seal the gaps.
- By contrast, most modern concrete develops serious cracks within a few decades.
- Understanding the self-healing process could help engineers design more durable and sustainable modern concrete.
The student wants to highlight the potential modern significance of the research findings.
Which choice most effectively uses relevant information from the notes to accomplish this goal?
For rhetorical synthesis questions, first identify the goal in the question (here, “potential modern significance”). Then find the note(s) that directly address that goal (the bullet about designing more durable and sustainable modern concrete). Finally, pick the choice that accurately combines the key finding with that goal, and avoid choices that only provide background or describe a problem without connecting it to the research’s modern impact.
Hints
Clarify what the question is asking for
Focus on “potential modern significance.” You need a choice that explains how the finding could help modern concrete, not just what the finding is.
Find the most relevant note
Look for the bullet that mentions what engineers could do in the future with this information (durable/sustainable modern concrete).
Match notes to choices
Choose the option that combines (1) the discovery (lime clasts/self-healing) and (2) the modern benefit (improving modern concrete).
Step-by-step Explanation
Understand the task in the question
The student wants to highlight the potential modern significance of the research findings.
That means the sentence should explain how the discovery about Ancient Roman concrete could matter for modern building materials (a future benefit or application), not just describe the past.
Locate the key note about modern impact
The note that directly addresses modern significance is:
- “Understanding the self-healing process could help engineers design more durable and sustainable modern concrete.”
So the best choice should link the finding (self-healing via lime clasts) to improving modern concrete.
Eliminate choices that don’t state a modern application
Choices that only (a) describe the Pantheon’s durability, (b) describe modern concrete’s cracking, or (c) describe lime clasts without connecting them to modern use do not meet the goal.
The best answer must include both the research finding and its potential modern benefit.
Select the choice that matches the goal
The sentence that explicitly connects the discovery about lime clasts and self-healing to creating better modern concrete is:
“MIT engineers found that lime clasts in Roman concrete enable self-healing and could inspire more durable, sustainable modern concrete.”