I'd say is a, since the point of a persuasive essay is to give your opinion backed up by research with proof typically, however due to the wording by saying 'references' I don't believe it's b.
Hoped it helped! c:
- Kat
Answer:
A, B
Explanation:
While C and D are also important factors in giving a speech, they do not specifically help create a friendly and comfortable tone.
