Digital PSAT Reading and Writing Practice Question 153: Answer and Explanation
Question: 153
It is said that Benjamin Franklin suggested the use of foxfire (bioluminescent fungi) as a viable light source on an early variety of submarine, _______ it would consume considerably less oxygen than the combustion reactions of candle or lamplight.
Which choice completes the text with the most logical transition?
- A. but
- B. previously
- C. as
- D. while
Correct Answer: C
Explanation:
(C) "As" conveys a cause-and-effect relationship between Franklin's suggestion and the reason for his suggestion. The other options do not show a cause-and-effect relationship.
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