In this task, you are given a question containing a blank (_) and two options. You should pick the best option to answer the question. Please answer with "A" or "B".

Example Input: Logan asked Brian to help him with the algebra for _ was easily passing the class. (A) Logan (B) Brian
Example Output: B

Example Input: Megan asked Elena what time she had to go to the doctor but _ forgot what time the appointment was. (A) Megan (B) Elena
Example Output: B

Example Input: Lawrence has become very withdrawn and solitary. Donald, on the other hand, has become aggressive and disruptive. While both changes indicate emotional problems, _ has externalized his. (A) Lawrence (B) Donald
Example Output:
B