What is the correct restart if a player enters the penalty area before the execution of a penalty kick and the ball goes into the net?

When a player enters the penalty area before the execution of a penalty kick and the ball subsequently goes into the net, the proper restart is to have the penalty kick retaken. This is because the Laws of the Game stipulate that both the kicker and any other players must adhere to specific conditions during the execution of a penalty kick. If any player (either attacking or defending) enters the penalty area prematurely, it results in an infringement that nullifies the outcome of the kick, regardless of whether the ball crosses the goal line or not. Thus, the penalty kick must be retaken to ensure that all conditions of fairness and legality are upheld.

The other options would not be applicable in this scenario due to the specific violation of entering the area early, which clearly indicates that the initial attempt was compromised and cannot be deemed valid.