With no explanation, chose the best option from "A" or "B". Nancy is at home when her son Paul comes in and tells her he wants to be an astronaut when he grows up. Nancy wants to mention how hard that would be.

A: Nancy tells Paul that it's a difficult tasks but that if others have done it so can he if he works hard.
B: Nancy tells Paul that it's an impossible dream since only a few people every few years get to be astronauts.
A.