Trying to lose belly fat is Laura was asking Amy for advice, 
OPTIONS:
- Laura knew lots of ways to lose body fat.
- Amy knew lots of ways to lose body fat.
Amy knew lots of ways to lose body fat.

Justin drank a lot more alcohol than Nelson during the weekends, so 
OPTIONS:
- Justin had an unhealthy pancreas.
- Nelson had an unhealthy pancreas.
Justin had an unhealthy pancreas.

At the end of the class, Jason helped Lawrence because 
OPTIONS:
- Jason couldn't think of a topic for the research paper.
- Lawrence couldn't think of a topic for the research paper.
Lawrence couldn't think of a topic for the research paper.