In the story when Trevor or T becomes a new leader of the gang, the latter listen to him and gather around him as the excerpt also mentions. Blackie is a former leader of the gang and in this excerpt when T becomes a leader of the gang he is angry because his view about not destroying the house is not accepted. It shows the gang doesn't have such a code or something similar that they follow others randomly. The correct answer is C.
The correct answer would be C. Randomly follows others. This is because in the novel the gang has decided that T has better ideas or at least more interesting ones. They are intrigued by the prospect of blowing up the house and are eager to become T's followers, instead of Blackie's. To be fickle means to easily change loyalties.
The sentence showed the part of the story where Marilyn is making letters for her family. She wants her brother to remember only the positive side of her. This is a paraphrase of the sentence. "She paused from time to time to think carefully on what words to say for her family, then she continued to write her letters."