Problem: How does the sentence end?

Adam asked Brian to teach them how to moonwalk since 
OPTIONS:
- Adam knew they had perfected it last year for a talent show.
- Brian knew they had perfected it last year for a talent show.
Answer: Adam knew they had perfected it last year for a talent show.

Problem: How does the sentence end?

Emily sold Monica a bottle of lotion that she promised would keep her smooth and hair free; 
OPTIONS:
- Emily likes buying goods .
- Monica likes buying goods .
Answer: Monica likes buying goods .

Problem: How does the sentence end?

Of course Maria felt overworked while Felicia did not, 
OPTIONS:
- Maria did all of the work on the project.
- Felicia did all of the work on the project.
Answer: Maria did all of the work on the project.

Problem: How does the sentence end?

The seamstress needed to hem the jeans of Katrina but not Lindsey because 
OPTIONS:
- Katrina was very tall.
- Lindsey was very tall.
Answer:
Lindsey was very tall.