The pieces of dialogue from the passage that support the claim that Laney has a good relationship with Darla are:
C. "Wait a minute, maybe she did it on purpose." (paragraph 8)
D. "That’s just to throw you off." (paragraph 8)
These responses show that Laney is engaged in the conversation, thinking critically about the situation, and offering insight, which suggests a supportive and understanding relationship with Darla.