Mark liked drawing so he took art classes instead of music lessons because at the 
OPTIONS:
- art classes he would be unsure of what to expect.
- music lessons he would be unsure of what to expect.
music lessons he would be unsure of what to expect.

Rachel's research wasn't as thourough as Cynthia's because 
OPTIONS:
- Rachel didn't have access to the chemistry lab.
- Cynthia didn't have access to the chemistry lab.
Rachel didn't have access to the chemistry lab.

Because Betty learned French in school but Kayla grew up in France, 
OPTIONS:
- Betty spoke basic French.
- Kayla spoke basic French.
Betty spoke basic French.