Answer: Clearly States--most likely to persuade
Older--somewhat likely to persuade
Shouts--not likely to persuade
Step-by-step explanation:
Someone who provides their opinion in a professional manner and with appropriate reasoning is most likely to persuade those who are reading.
Someone who is older than the audience may persuade the audience off of their age alone because the audience will feel that the author is more experienced.
Someone who only shouts and disagrees with everyone else's opinion because they feel their opinion is the best will not persuade anyone as readers will not feel that their opinion is respected.