Stephanie Kwolek—chemist at DuPont—invented the synthetic fiber Kevlar for _________ to reinforce car tires.
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writingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
use. By designing a material
B
use by designing a material
C
use; by designing a material
D
use by designing a material;
Correct Answer: B
Choice B is the best answer. The phrase "by designing a material" is a prepositional phrase that modifies "use" and should follow without punctuation.
Choice A is incorrect because it creates a fragment. Choice C is incorrect because a semicolon cannot separate a phrase from the clause it modifies. Choice D is incorrect because the semicolon is misplaced at the end.