Hello there! the answer is A, or There 11 players on the team.
Explanation:
It is A because if you add together all the players, you get 11. (1) 10 year old, (3) 11 year olds, (2) 13 year olds, (1) 14 year old, (4) 15 year olds (1 + 3 + 2 + 1 + 4 = 11)
It is not B because there are three 11 year olds and two thirteen year olds
It is not C because there are players who are 11, 13, 14 and 15.
It is not D because there are 3 players that are 11 and 4 players that are 15.