when is this a fault..............

[garef]

a blocker reaches over the net and contacts the ball completely on the opponents side of the net. this is a fault when...........


A > WHEN THE BALL IS FALLING NEAR THE NET AND, IN THE REFEREE'S JUDGEMENT, NO OPPONENT IS NEAR ENOUGH TO MAKE A PLAY ON THE BALL

B > DURING SIMULTANEOUS CONTACT WITH THE OPPONENTS ATTACK HIT

C> AFTER AN ATTACK BY THE OPPONENT

D> AFTER THE THIRD HIT BY OPPONENTS

[MCBear]

B > during simultaneous contact with the opponents attack hit.

NCAA Rule
14.6.4.2 Blocking the ball across the net above the opponent’s team area is legal provided:

14.6.4.2.1 the block is made after the opponent has executed an attack hit (simultaneous contact with the attack-hit is a blocking fault);