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.

Obama delivered a speech with a microscope in public
(A) Obama can't use a microscope
(B)The microscope is in the laboratory
(C)Microscopes cannot be used to amplify sound
C