Answer:
D. Aunt
Explanation:
Even though "mom's sister" and "family member are technically both correct, in a casual conversation, the most common and normal thing is to refer to the family member, in this case, that it's giving you the present, as their blood relation to you ( my mom, my sister, my aunt).
Is there more to this question? If not I would use a word like Persuade? listeners. Or Engage? listeners.
gregor is disappointed because he was very against the transformation