Final answer:
The ruling when A1 fumbles on B's 2-yard line and the ball goes into B's end zone and out-of-bounds there is a touchback for Team B.
Step-by-step explanation:
The ruling when A1 fumbles on B's 2-yard line and the ball goes into B's end zone and out-of-bounds there is a touchback for Team B. In football, a touchback occurs when the ball is ruled dead in the opponent's end zone, and the team defending that end zone gains possession of the ball. This ruling awards possession to Team B and places the ball at their 20-yard line.