Share them through and anonymous account where only people you trust can see them. The other options seem a bit harsh.
B. The author contrasts his uncle's expression with his own
People usually believe that an argument is nasty and always opposes a concept or initiates disagreement, but in literature, an argumentative piece or essay is merely arguing one's view of a topic and does not have to be rude or disagreeable. Also, arguments can be civilized and kind if they are conducted correctly.
I think the correct answer is B