Under obstruction, obstruction can be ignored only if which conditions are both met?

• A. The batter-runner reaches first base.
• B. All other runners advance at least one base.
• C. Both A and B.
• D. Obstruction of a batter can never be ignored.

Answer: (C)

Under obstruction, you can ignore the call only when the play would have progressed the same way even with the obstruction. That happens if the batter-runner does reach first base and every other runner has advanced at least one base. If both of those things occur, no penalty is applied and the play stands as is. If either condition fails—say a runner does not advance, or the batter-runner does not reach first—then you don’t ignore the obstruction; the obstructed runner is awarded the base they would have reached, and other adjustments are made accordingly. So the two conditions must both be met: the batter-runner reaches first base and all other runners advance at least one base.