This is a test of commonsense with single/multi-choices. Complete the next sentence:

A young child is seen sitting behind a drum set playing the drums. the boy

Choices:
A). beats the drums with his hands continuously while using his legs to move forward and backwards..
B). continues playing the instrument while the camera zooms in on him playing..
C). continues moving himself around the set when another child walks back into frame..
D). moves his hands all around while the camera follows him moving his hands up from the drums to his head..
The answer is:
B).