B$.$ Both piston sides will alternately be pressurized with compressed air

C$.$ Cylinder $1$ A is not able to extend

D$.$ None of the above

$31.$ A simplified diagram is shown below. Which statement about the operation of the control system is correct? $(4$ points$)$

A$.$ While cylinder $2$A advances, cylinder $1$A remains in the advanced end position

B$.$ Cylinder $2$A advances after cylinder $1$ A has reached its retracted end position

C$.$ Cylinder $1$ A retracts as soon as valve $2$ VI is actuated.

D$.$ The solenoid coil of IV$1$ is energized as long as cylinder $1$A advancing and retracting.

$13$