With "himself" italicized, it is an intensive pronoun because he is referring to himself directly. An intensive pronoun emphasizes its antecedent and in this sentence's case, Einstein is the antecedent.
Answer: "The American colonists strongly opposed tax laws imposed by the British government" .
"The American colonists were angered by the presence of British soldiers who had found employment in America" are the sentences that state reasons for tension between the American colonist and the British political powers.
The first one is A:) The tension in the room, and the second is C:) The characterization suggests Anne's optimism