Why does Mrs. Sands not persuade Doree to refrain from seeing her ex-husband?

Why does Mrs. Sands not persuade Doree to refrain from seeing her ex-husband?
A.Her professional ethics forbids her to do so.
B.She wants to leave the decision-making to her rather than making decision for her.
C.She is afraid of enraging Doree by mentioning her husband.
D.She cares for Doree too much.
正确答案：B