详解
Choice D is the best answer. In lines 61-62("pittance...hard"), the narrator states that he once regarded Mr. Crimsworth as his "brother." This statement provides evidence that the narrator originally viewed Crimsworth as a sympathetic ally.
Choices A, B, and C do not provide the best evidence for the claim that Crimsworth was a sympathetic ally. Rather, choices A, B, and C provide evidence of the hostile relationship that currently exists between the narrator and Crimsworth.