Problem: How does the sentence end?

Mary expected total loyalty from Megan, so 
OPTIONS:
- Mary did anything they asked of them with no question.
- Megan did anything they asked of them with no question.
Answer: Megan did anything they asked of them with no question.

Problem: How does the sentence end?

Amy never has time for golf, while Kayla plays almost every day, so 
OPTIONS:
- Amy is busier on average.
- Kayla is busier on average.
Answer: Amy is busier on average.

Problem: How does the sentence end?

Erin refused to clean the house so Laura had to do it since 
OPTIONS:
- Erin cared if their guest came over to a tidy house.
- Laura cared if their guest came over to a tidy house.
Answer: Laura cared if their guest came over to a tidy house.

Problem: How does the sentence end?

Misty decided against the fern and brought the cactus home instead, The 
OPTIONS:
- fern was a harder plant to kill.
- cactus was a harder plant to kill.
Answer:
cactus was a harder plant to kill.