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 Q]: Natalie told Tanya about a ghost that haunts the house,  but _ failed to frighten her. (A) Natalie (B) Tanya
[EX A]: A

[EX Q]: The doctor Felicia told Maria to do breathing exercises to strengthen her lungs after she caught pneumonia. _ also prescribed her antibiotics. (A) Felicia (B) Maria
[EX A]: A

[EX Q]: Christopher got a cat from the shelter but not Kenneth because _ had an allergy of cats. (A) Christopher (B) Kenneth
[EX A]:
B