Which of the following events will cause the clock to start with the next snap?

The clock starting with the next snap after a team is awarded a new series is based on the rules concerning first downs in football. When a team gains a new series of downs, it typically means they have either advanced the ball ten yards from the previous line of scrimmage or received a penalty that resulted in a new set of downs. In this situation, the game clock is reset and begins again at the next snap of the ball to ensure that the timing of the game remains consistent with the flow of play.

Regarding the other events, a completed forward pass typically results in the clock stopping until the next snap, while kicking the ball out of bounds also halts the clock until it is ready to be restarted with the next snap. A 15-yard penalty may, depending on the circumstances, stop the clock for administration but does not necessarily lead to a new series. Thus, in the context of this question, the situation that results in the clock starting with the next snap is when a new series of downs is awarded.