Charlie and His Friends Formed a Band to Play Country

Charlie and his friends formed a band to play country music. Pete plays the banjo, Hannah is on the drums, David plays the accordion, Joe is the fiddler, while Charlie is at the piano. They want to play music for their friend's wedding and so they practice every Saturday for two hours. The band members have

A) Environmental interdependence
B) Resource interdependence
C) Reward interdependence
D) Role interdependence