In the author's opinion ______.

A．nothing can be done about violence in sports
B．football players are concerned about violence in sports
C．violence in sports is worse now than it ever was
D．athletes are confused about what should be permitted in sports

A．the personalities of athletes produce violent confrontations
B．athletes should not have to accept unnecessary physical abuse
C．athletes salaries are already too high
D．athletes need higher salaries to compensate for their injuries