1.

1). Only A2). Both A and D3). Only B4). Both B and C

Answer»

The sentence USES the form 'beginning to question', which is incorrect and NEEDS improvement.

It should have the plural simple present tense VERB 'are' before 'beginning to question' to make it meaningful.

The only alternative that improves the sentence is A.

None of the other alternatives can make the sentence meaningful.

Therefore, the CORRECT ANSWER is option 1.



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