You will be given a definition of a task first, then some input of the task.
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 professor write on the beach with his pen
(A) Pen can be used for writing
(B)Sand will damage a pen if the pen is used to write on beach
(C)Professors usually know how to write in multiple languages
Output:
B