Explanation

The question requires transforming a sentence from passive voice to active voice. The original sentence, "My suggestion was not accepted," is in passive construction. In passive voice, the subject (in this case, "My suggestion") receives the action rather than performing it, and the doer of the action is either omitted or emphasized less.

In transforming this sentence to active voice, we need to identify a subject that performs the action of the verb "accept." The option "A) Someone didn't accept my suggestion" successfully does this. Here, "Someone" acts as the subject who is performing the action of not accepting, and "my suggestion" remains the object affected by the action.

The other options provided (B, C, and D) are irrelevant or incomplete choices, indicated by the dash ('-') and period ('.'), which do not present any form of sentence. Therefore, the only appropriate transformation that preserves the meaning while adopting the active voice is option A. This change makes the sentence clearer by directly stating who failed to accept the suggestion, which is a hallmark of active voice.