Step 1: Context.
The reference suggests that the daughter values her mother's wisdom and advice above others.
Step 2: Option analysis.
(A) father's: Incorrect.
(B) mother's: Correct.
(C) sister's: Incorrect.
(D) brother's: Incorrect.
Step 3: Conclusion.
Correct answer is (B) mother's.
“One of these days you’re going to talk yourself into a load of trouble,” her father said aggressively. What do you learn about Sophie’s father from these lines? (Going Places)