Despite his lack of formal training, the young prodigy proved to be remarkably capable _________ solving complex calculus problems.
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writingWhich choice completes the text so that it conforms to the conventions of Standard English?
A
to
B
at
C
of
D
with
Correct Answer: C
Choice C is the best answer. The adjective "capable" is conventionally followed by the preposition "of" (e.g., "capable of doing something").
Choice A is incorrect because "capable to" is grammatically incorrect; "able" would take "to," but "capable" takes "of." Choice B is incorrect because "capable at" is not the standard prepositional phrase. Choice D is incorrect because "capable with" is not the conventional usage.