With no explanation, chose the best option from "A" or "B". Brian and Rex and roommates in a small dorm room and Rex is always leaving his things lying around. Brian wants to get Rex to clean up his side of the room.

A: Brian chats with Rex, mentioning that he would prefer a cleaner room and checks to see if Rex has any complaints about him that he can work on.
B: Brian tells Rex that he will file a complaint with the Resident Assistant to get him kicked out if he doesn't clean up his things immediately.
A.