The study of deep-sea ecosystems is expanding. _________ believe that discovering new species can lead to medical breakthroughs.
9
writingThe second sentence contains a pronoun that makes the paragraph ambiguous. Replace it with the choice that best reduces that ambiguity.
A
They
B
Researchers
C
Several
D
Many
Correct Answer: B
Choice B is the best answer. "Researchers" specifies who holds the belief, resolving the ambiguity of the vague pronoun.
Choice A is incorrect because "They" has no clear antecedent. Choice C is incorrect because "Several" is vague. Choice D is incorrect because "Many" is vague.