Problem: How does the sentence end?

Brian wanted to teach Robert how to paint using watercolors but 
OPTIONS:
- Brian was a bad learner.
- Robert was a bad learner.
Answer: Robert was a bad learner.

Problem: How does the sentence end?

Despite attending school together, Mary did not want to be friends with Elena. 
OPTIONS:
- Mary thought that they were generally nice and kind to other people.
- Elena thought that they were generally nice and kind to other people.
Answer: Elena thought that they were generally nice and kind to other people.

Problem: How does the sentence end?

Laura installed a new car seat in the car for Jessica, then 
OPTIONS:
- Laura moved on to the next car.
- Jessica moved on to the next car.
Answer: Laura moved on to the next car.

Problem: How does the sentence end?

William knew pregnancy much better than Derrick , so 
OPTIONS:
- William made sure to be elsewhere for the birth.
- Derrick made sure to be elsewhere for the birth.
Answer:
Derrick made sure to be elsewhere for the birth.