Richard Nixon can, to some extent, be described as a tragic hero. A tragic hero, according to Aristotle, is a character who possesses many important qualities, as well as one major flaw. This flaw or error in judgement is what brings about the downfall of the character. Most of the time, the fall is enormous as these heroes were quite successful before their fall.
In the case of Nixon, his major error in judgement would be Watergate. Nixon acted in a wrong way in all matters related to this problem. His error in judgement led him to fall from his successful position (President), which occurred when he resigned.
The correct option is B) “She had rested on the rock”. Helping verbs are verbs that help the main verb with its meaning and they also set the time of the verb. In this case, the helping verb “had” is helping the main verb “rested”. The auxiliary verb “had” is also setting the verb tense of the sentence, which is past perfect.
The other examples “paddled”, “went” and “swam” are action verbs that do not need a helping verb to extend or add meaning.