The tone can make the reader see the story or understand it in a easier or different aspect.
I would personally put A :)
Ad hominem is an attack against the arguer instead of the argument itself in order to cast doubts about arguer's argument.
The rhetorical question is B.
"I grass green?" has a very obvious answer and is a very unnecessary question.
another example: Sojourner Truth; Ain't I a woman
