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.

It is perfectly normal for adults to have teeth fall out.
(A) After a child's tooth falls out, an adult tooth grows in its place.
(B)If an adult's tooth falls out, a new one will not grow in its place.
(C)The teeth in an adult's mouth should be permanent.
Output:
C