Problem: How does the sentence end?

The lawn of Amy looks much browner than Lindsey's because 
OPTIONS:
- Amy uses a much better fertilizer.
- Lindsey uses a much better fertilizer.
Answer: Lindsey uses a much better fertilizer.

Problem: How does the sentence end?

Kevin asked Leslie if there is a thrift store near the city centre, because 
OPTIONS:
- Kevin wasn't sure.
- Leslie wasn't sure.
Answer: Kevin wasn't sure.

Problem: How does the sentence end?

Jennifer's skates are much newer and more expensive than Natalie's because 
OPTIONS:
- Jennifer is very poor.
- Natalie is very poor.
Answer: Natalie is very poor.

Problem: How does the sentence end?

Matthew made a complex graph but not Ian because 
OPTIONS:
- Matthew taught a class at an advanced level.
- Ian taught a class at an advanced level.
Answer:
Matthew taught a class at an advanced level.