The museum collection, including rare artifacts, _______ impressive.

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Which choice completes the text so that it conforms to the conventions of Standard English?

A

are

B

is

C

were

D

have been

Correct Answer: B

Choice B is the best answer. "Including" doesn't change subject.

Choice A is incorrect because "are" is plural. Choice C is incorrect because "were" is plural. Choice D is incorrect because "have been" is plural.