The theory, along with its supporting evidence, _______ published in a leading scientific journal.

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

A

was

B

were

C

have been

D

are

Correct Answer: A

Choice A is the best answer. This question tests subject-verb agreement with interrupting phrases.

  1. Context clues: The subject is "theory" (singular); "along with" doesn't create a compound subject.
  2. Meaning: Phrases like "along with," "as well as," and "in addition to" don't affect subject-verb agreement.
  3. Verify: "The theory... was published" correctly uses singular verb.

💡 Strategy: Phrases set off by commas (along with, as well as, together with) don't change subject number.

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