Which detail best supports the key idea that the mother wants to serve others?

A the mother intended to postpone joining one vision until the narrator was out of high school
B the mother wishes to accept the opportunity to open a clinic in cairo
C the mother created a routine with the narrator when the fater was working
D the mother allows the father to tell the narrator about the change in plans

B the mother wishes to accept the opportunity to open a clinic in Cairo best supports the key idea that the mother wants to serve others.