A dead-ball appeal:

• A. Is not legal.
• B. Can be made by the coach or defensive player verbally after all runners have completed their advancement.
• C. Can be made only by a defensive player with the baseball.
• D. May be made immediately when the ball becomes dead.

Answer: (B)

Dead-ball appeals let the defense (or the coach) call attention to a baserunning or rule infraction after play stops, using a verbal appeal to the umpire. The appeal must be made after the ball becomes dead, and it’s typically done once the runners have finished their advancement so the outcome isn’t affected by ongoing action. That’s why the correct statement is that the coach or a defensive player may verbally appeal after all runners have completed their advancement.

This option is better than the others because a coach is allowed to appeal (not just a defensive player), appeals aren’t restricted to immediately at the moment the ball becomes dead, and a dead-ball appeal is indeed legal.