You will be given a definition of a task first, then some input of the task.
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'.

(A) not giving my roommate money that would have saved his cat's life
(B) no longer wanting to interact with my ex-girlfriend after several incidents
Output:
A