The correct answer is C. He asked her if she was coming to the party.
The sentence “He said to her, ‘Are you coming to the party?'” is an example of a direct question. Direct questions are used to ask for information. In this case, the speaker is asking the listener if they are coming to the party.
The other options are incorrect because they do not accurately reflect the meaning of the sentence. Option A, “He asked her whether she was coming to the party,” is a paraphrase of the sentence, but it does not capture the directness of the question. Option B, “He told her if she was coming to the party,” is incorrect because the speaker is not telling the listener anything, they are asking them a question. Option D, “He asked her if she will be coming to the party,” is incorrect because the speaker is asking about the listener’s plans for the present, not the future.