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".

Ex Input:
Natalie told Tanya about a ghost that haunts the house, but _ failed to frighten her. (A) Natalie (B) Tanya

Ex Output:
A

Ex Input:
Mark liked drawing so he took art classes instead of music lessons because the _ he would know what to expect. (A) art classes (B) music lessons

Ex Output:
A

Ex Input:
The belly button of Christopher has lint in it, while Matthew's has none, so _ is the cleaner person. (A) Christopher (B) Matthew

Ex Output:
B