Problem: How does the sentence end?

Kayla was able to keep flowers alive longer than Amy because 
OPTIONS:
- Kayla had a green thumb.
- Amy had a green thumb.
Answer: Kayla had a green thumb.
sentence: The air in the quarantine was replaced with liquid as the  OPTIONS:
- air was contaminated, so we acted fast.
- liquid was contaminated, so we acted fast.
complete: air was contaminated, so we acted fast.
Mary noticed Amy's accent so 
OPTIONS:
- Mary told her which country she had been a citizen of.
- Amy told her which country she had been a citizen of.
Amy told her which country she had been a citizen of.
Input: Continue writing.

Leslie did not style their hair into dreadlocks like Samuel because 
OPTIONS:
- Leslie had very long hair.
- Samuel had very long hair.

Continued: Samuel had very long hair.
Story needs to be completed:
Jeremy tried to use willpower to control his diet and stay off social media, but he found the 
OPTIONS:
- diet harder to stop using.
- social media harder to stop using.

My choice:
social media harder to stop using.
Problem: How does the sentence end?

Kenneth was a survivalist and made their own gun which Ryan liked so, 
OPTIONS:
- Kenneth bought the gun.
- Ryan bought the gun.
Answer:
Ryan bought the gun.