The two pieces of dialogue 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 lines show that Laney is engaged in the conversation, offering insight and analysis about the situation, which indicates a supportive relationship. She treats Darla's concerns seriously while also providing her perspective, suggesting that she knows her daughter well and cares about her feelings.