What makes the girl capable of kicking the soccer ball?

a
The bones in her leg contract and relax causing the muscles in her leg to kick the ball.

b
The bones in her leg send a message to the muscles causing them to move and kick the ball.

c
The muscles in her leg contract and relax causing her leg to move and kick the ball.

d
The muscles in her upper body and hands send a message to the leg muscles and make them move.