i believe the answer to be B, the point of persuasive writing is to change the readers point of veiw.
with regardes to answer C you will not necssisarly need to remeber it unless your teacher implies so which is still not going to be the point. as well as D the point of reading persuasive writing is to change the readers point of view(thinking on the topic). whether or not the reader cries or laugh is not the point the author is trying to get across he might use these tacits to more or less help convince you though.
You need to be careful to read the author's writing, as they are trying to persuade you to think a different way. If you miss a small detail - one that may have been less persuasive - then your backup to their claim may not be as strong.
