Answer:
The second option, 3 (three) outs
Explanation:
In the sport of softball, much like baseball, a team on offense is not limited in the amount of at-bats during an inning, but once they have 3 outs, they must surrender their side and switch to defense.
The basic ways in which an out can be attained are: causing 3 strikes on a batter; catching a ball in mid-air; collecting the ball from the ground and throwing it to a defensive player on a base the runner is forced to run to before the runner can reach that base; and collecting the ball and touching the runner with the ball (known as a tag) or with the ball in a gloved hand while the runner is not on their designated base.
One could potentially argue that the minutiae of this question's wording would suggest there are 2 outs allowed before switching sides and the 3rd out forces the switch, but this does not seem to be the intent of the question.
So in short, must switch sides at 3 outs, the second option.
