He was knocked unconscious by the football and was unfazed by the baseball. That is because the 
OPTIONS:
- football hit him hard.
- baseball hit him hard.
football hit him hard.

Joel wanted to play the drums in Aaron's band so 
OPTIONS:
- Joel invited him to audition for the band.
- Aaron invited him to audition for the band.
Aaron invited him to audition for the band.

Caroline used a wig rather than get treatment for her hair with fancy products. The 
OPTIONS:
- treatment was more expensive.
- wig was more expensive.
treatment was more expensive.