In a case where B1 hit a foul ball while out of the batter's box, what will the ruling be?

When B1 hits a foul ball while out of the batter's box, the ruling that B1 is out for illegal contact is correct because a player must be in the batter's box to legally make contact with the ball. The rule emphasizes that the batter must not step outside the designated area while hitting. In this scenario, because B1 made contact with the ball while outside of the batter's box, the action is deemed illegal, resulting in an out. This upholds the integrity of the game by ensuring that all players adhere to the established boundaries and rules of play.

The other options do not align with the rules governing a batter's position. Labeling the hit as legal disregards the specific requirement for being within the batter's box. Additionally, saying B1 is simply out or allowing B1 to continue to bat fails to recognize the violation of the basic rules. Thus, the ruling for illegal contact accurately reflects the enforcement of the game rules.