Problem: How does the sentence end?

The mosquitoes were out in force for the summer so I relied on bug spray and not a citronella candle because the 
OPTIONS:
- candle was effective.
- bug spray was effective.
Answer: bug spray was effective.

Problem: How does the sentence end?

John gave me a phone that was better than my tablet, because the 
OPTIONS:
- phone was an older version.
- tablet was an older version.
Answer: tablet was an older version.

Problem: How does the sentence end?

Emily likes to go the movies on dates, while Natalie prefers a nice dinner. 
OPTIONS:
- Emily is a movie buff.
- Natalie is a movie buff.
Answer: Emily is a movie buff.

Problem: How does the sentence end?

When Cynthia had to flex, the crowd laughed unlike when Carrie flexed because 
OPTIONS:
- Cynthia had undefined muscles.
- Carrie had undefined muscles.
Answer:
Cynthia had undefined muscles.