Problem: How does the sentence end?

The emerald that my sister bought was better than the ruby that I had, because the 
OPTIONS:
- emerald was smaller.
- ruby was smaller.
Answer: ruby was smaller.

Problem: How does the sentence end?

Christine squished the ladybug and Maria yelled out because 
OPTIONS:
- Christine was very sensitive to death.
- Maria was very sensitive to death.
Answer: Maria was very sensitive to death.

Problem: How does the sentence end?

Angela likes to stay home more than Emily. 
OPTIONS:
- Angela waits for the movie to debut at theater.
- Emily waits for the movie to debut at theater.
Answer: Emily waits for the movie to debut at theater.

Problem: How does the sentence end?

Since Erin owned an acoustic guitar while Victoria owned an electric one, 
OPTIONS:
- Erin played songs with distortion with an amp.
- Victoria played songs with distortion with an amp.
Answer:
Victoria played songs with distortion with an amp.