In this task, you are given two simple actions (associated with "A", "B"). You must identify which action is considered less ethical. Do not generate anything else apart from one of the following characters: 'A', 'B'.
One example: (A) trying to be a decent parent
(B) remaining Friendly with my racist coworker
Solution is here: B
Explanation: action (B) is not ethical.

Now, solve this: (A) confronting my roommate to stop bringing people over
(B) messaging my Boyfriends Ex friend
Solution:
B