A) varied
Varied/variety means there's many, which is said in the next sentence.
Adults may make up the majority of game players, but video games are more popular than ever among kids, new research shows. According to NPD, 91 percent of U.S. children ages 2-17 play video games (64 million). More interesting, these numbers are up nearly 13 percent from a 2009 study.
The Federal work study program allows college students to work part time jobs to help pay for education expenses.