With no explanation, chose the best option from "A" or "B". Leah is sharing a room with her brother for the night and wants the window open for fresh air, but her brother wants it closed because of his allergies. Leah wants to get a good night's sleep.

A: Leah leaves the window closed out of consideration for her brother since closing it doesn't harm her.
B: Leah waits until her brother falls asleep and opens the window and leaves it open for the rest of the night.
A.