Hand Volley

Marissa hit a volley that hit her opponent on the back of her hand, and the ball went back over the net onto Marissa’s side for a winner. Marissa and her partner gave their opponents the point.

Was this correct?

They should play a let since the ball touched the opponent’s hand.

Marissa and her partner were correct to give the opponents the point for the winner.

Marissa and her partner should have won the point since the ball touched the opponent’s hand.

I’m not sure