The correct answer to this open question is the following.
Although there are no options attached or further references, we can comment on the following.
Coach Carver has created a new team game for his students to play. It involves sprinting, tagging, and throwing a ball. Each team consists of 10 to 20 students. The place that is the safest to play the game is a football field.
A football or a soccer field is the safest place to play this game because students have a field that is 100 yards long, 54 width, to do whatever they want to do in a safe environment. No obstacles, no wholes in the ground, a great turf surface, and all the space they need to have fun.
When devising creative and fun games like this, safety is of the utmost priority and there have to be minimum risks. SO by the number of students involved and the kind of balls they are going to use, a football field is the best place to play.