The correct answer is C. She asked if the secretary is coming to the meeting.
Option A is incorrect because it uses the past tense verb “was” instead of the present tense verb “is.” The speaker is asking about a future event, so the present tense is correct.
Option B is incorrect because it uses the subjunctive mood. The subjunctive mood is used to express wishes, possibilities, or conditions that are not real or certain. In this case, the speaker is asking about a real event, so the indicative mood is correct.
Option D is incorrect because it uses the past participle “corning” instead of the present participle “coming.” The present participle is used to form the progressive tenses, which are used to describe actions that are happening at the time of speaking. In this case, the speaker is asking about a future event, so the simple present tense is correct.