Analysis: This problem can be solved by an equation. Suppose * * * X people took part in the competition. Since each player has to compete with other players, each player has to compete for the x- 1 game, and everyone has to compete for the x(x- 1) game. Since the game is between two people, the number of games is X (X- 1).

Solution: Solution: Assuming that * * * there are X people participating in the competition, you can get:

x(x- 1)÷2= 120

x(x- 1)=240，

The solution is x1=16x2 =-15 (truncation).

X = 16.

A: * * * There are 16 participants.

So the answer is: 16. Choose B.

Comments: In this kind of problem, the relationship between the number of participants and the number of games is: the number of games = the number of people × (the number of people-1) ÷ 2.