B. personal pronoun
The antecedent comes before the pronoun, everyone, his. Everyone is the antecedent and precedes his own book.
Yes, because the act of being selfish is something we do to keep ourself alive, if we were constantly selfless we would not be ensured of our own survival.
In the majority opinion, Fortas suggest that the reason for the school authorities' actions is that they were uncomfortable with such a controversial topic. According to Justice Fortas school authorities wanted to avoid controversy on the topic of Vietnam war.
C) A modern newspaper is printed many more times than previous newspapers--and still is relatively cheap to buy.
The text says
"Johannes Gutenberg made the earliest printing press, as we know it today, around 1450. These presses used movable type to create many pages of news faster and more easily than any other process. "
So the answer to the question (What can the reader infer the author means when he says that newspapers were not truly modern until after the invention of movable type?) is
C.