Set 3: Inferences

Explanation

Answer: D

PASSAGE

A city installed mirrors in a crime-prone alleyway. Researchers found that incidents of vandalism and littering decreased by 40% over the following months. Similar results were observed when the mirrors were installed in other high-crime areas.

What can be inferred from the study?

A. Mirrors have no effect on human behavior.

B. Crime only decreased because of increased police patrols.

C. Seeing their own reflection may make people more self-aware of their actions.

D. The mirrors were too expensive to be practical.✓ Correct

Detailed Explanation

This question asks you to draw a logical conclusion from the text. Mirrors reduced bad behavior—likely by making people see themselves, increasing self-awareness and accountability. A valid inference must be supported by evidence in the passage, even if not stated directly. Look for clues in the text that strongly suggest the answer. Avoid conclusions that require assumptions beyond what's written. Valid inferences are strongly supported by multiple pieces of evidence in the text. Be cautious of choices that go too far beyond what the passage actually states. The best inference is the one most directly supported by textual evidence.

Key Evidence:

• "vandalism and littering decreased by 40%"

• "similar results in other areas"

Why others are wrong: A (40% decrease shows significant effect.), B (Police patrols aren't mentioned.), D (Cost isn't discussed.).

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