Answer:
A) 3 or 6
Explanation:
120 divided 9 ways means there would be 13 1/3 teams so does not qualify. Any option with 9 as a potential solution is rejected.
120 divided 6 ways means 20 full teams play
120 divided 3 ways means 40 full teams play.
other options could be 2, 4, 5, 8, 10, 12, 15, 20, 24, 30, 60
though the court could get a bit crowded with some of those options.