Given the task definition and input, reply with output. In this task, you are given an impractical statement. You are also given three reasons (associated with "A", "B", "C") explaining why this statement doesn't make sense. You must choose the most corresponding reason explaining why this statement doesn't make sense.

The old lady watched her favorite show on a phone book.
(A) Phone books are not very entertaining
(B)You can only read a phone book
(C)Phone books have become obsolete since the internet
B