In the situation where B2 hits a pitch that rolls into the stands, what happens with R2 on base?

In the context of baseball rules, when a hit ball rolls into the stands, it is treated as a ground rule double if it happens while the ball is in play. In this scenario, B2, the batter, is awarded second base because the ball left the field of play. Since R2 is on second base at the time of the hit, the runner can advance based on the established rules for such a play.

When a ball rolls into the stands and represents a ground rule double, any runners on base are allowed to advance two bases. This means that R2, initially on second base, can advance to home plate, scoring a run. Therefore, the correct outcome is that B2 is awarded first base because the ball is dead at that point, and R2 is awarded home plate, which aligns with the rules governing ground rule doubles.

This reasoning highlights why the selected answer is correct, as it accurately reflects the consequences of the play in question within the guidelines established by baseball regulations. Other possibilities would misinterpret the handling of the situation as per the official rules.