Harry likes to be the center of attention in Ms. Long's Spanish II class. He makes off-task, funny remarks (in Spanish!), exaggerates his pronunciation, and other silly behaviors that cause his peers to laugh. Despite his behavior, Harry is very good at Spanish. Ms. Long set up a system in which Harry's Spanish class can earn time to play a game to review their Spanish vocabulary for part of the period on Friday, contingent upon Harry having appropriate behavior during class on Monday - Thursday. This is an example of which type of group reinforcement system?
a) independent
b) interdependent
c) dependent
d) quasi-dependent