Final answer:
If a pool of water forces the referee to move the ball for K1's kick, the free-kick lines can be more than 10 yards apart.
Step-by-step explanation:
The question is asking what can happen to the free-kick lines if a pool of water forces the referee to move the ball for K1's kick. The distance between the free-kick lines represents the 10-yard distance required for the opposing players to stay away from the ball during a free-kick. In this case, if the pool of water forces the referee to move the ball, it means the ball's original position might change, which can potentially affect the distance between the free-kick lines. Therefore, the answer is a) They can be more than 10 yards apart.