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.

Jack keeps still when he jumps from a building
(A) stillness is relative, and movement is absolute
(B)people cannot keep still when they jump
(C)buildings are high while Jack is short
B