Problem: How does the sentence end?

The plane had to arrive after the helicopter, so the 
OPTIONS:
- plane delayed leaving immediately to time the arrivals right.
- helicopter delayed leaving immediately to time the arrivals right.
Answer: plane delayed leaving immediately to time the arrivals right.

Problem: How does the sentence end?

Cynthia was less interested in the ballet than Elena because 
OPTIONS:
- Cynthia daughter was in the ballet.
- Elena daughter was in the ballet.
Answer: Elena daughter was in the ballet.

Problem: How does the sentence end?

Age wasn't a factor when Sarah gave birth to Jennifer, because no matter what, 
OPTIONS:
- Sarah would always be younger.
- Jennifer would always be younger.
Answer: Jennifer would always be younger.

Problem: How does the sentence end?

Kayla walked away from her friendship with Jennifer since 
OPTIONS:
- Kayla had endured enough damage to her self esteem.
- Jennifer had endured enough damage to her self esteem.
Answer:
Kayla had endured enough damage to her self esteem.