When does the clock restart following an official's timeout if no team was awarded a first down?

The correct answer is that the clock restarts on the "Ready!" signal from the official. In situations where no team has been awarded a first down, the rules dictate that the game clock resumes as soon as the referee signals for play to continue. This is consistent with the NFHS rules which specify that after an official's timeout that does not involve a stoppage for a first down, the clock will start again on the official's ready-for-play signal, ensuring a smooth transition back into the game.

This process helps maintain the flow of the game and provides a clear and standardized way for both teams to know when to resume play. The other options refer to different scenarios that do not apply in this case: for instance, the clock does not start after a team substitutes unless there has been a stoppage in the play due to that substitution. Similarly, timing associated with a coach's timeout or after the next play involves different rules and conditions that do not apply here.