Problem: How does the sentence end?

Russ bought a telescope to view the planet but he couldn't see the star because the 
OPTIONS:
- star was too far.
- planet was too far.
Answer: star was too far.

Problem: How does the sentence end?

Professor Felicia helped Kayla with the material at the library because 
OPTIONS:
- Felicia knew it very well.
- Kayla knew it very well.
Answer: Felicia knew it very well.

Problem: How does the sentence end?

Justin doesn't like Brian because 
OPTIONS:
- Justin hates self-centered people with egos the size of Texas and an attitude.
- Brian hates self-centered people with egos the size of Texas and an attitude.
Answer: Justin hates self-centered people with egos the size of Texas and an attitude.

Problem: How does the sentence end?

Jennifer tended to overthink every decision but Laura was more spur of the moment. 
OPTIONS:
- Jennifer missed out on a lot of things.
- Laura missed out on a lot of things.
Answer:
Jennifer missed out on a lot of things.