The audience at the play was laughing at Neil but not Kyle because 
OPTIONS:
- Neil was unfunny on stage.
- Kyle was unfunny on stage.
Kyle was unfunny on stage.

The mask that Diane made was mostly plaster and very little clay, because the 
OPTIONS:
- clay was cheaper.
- plaster was cheaper.
plaster was cheaper.

Steven spent years learning to play the piano while Kyle learned in a week. 
OPTIONS:
- Steven was a superior student.
- Kyle was a superior student.
Kyle was a superior student.