[Q]: How does the sentence end?

The twin's birthday was coming up. They had asked for gifts of books instead of toys. The 
OPTIONS:
- toys would cause the children to fight.
- books would cause the children to fight.

[A]: toys would cause the children to fight.
QUES: Continue writing.

When it comes to skateboarding, Elena is much better compared to Betty due to 

OPTIONS:
- Elena being hardworking.
- Betty being hardworking.
+++++++++
ANS: Elena being hardworking.
Problem: How does the sentence end?

Adam ate a lot while Logan ate very little, resulting in 
OPTIONS:
- Adam being diagnosed with obesity.
- Logan being diagnosed with obesity.
Answer: Adam being diagnosed with obesity.
sentence: I got a better tan when I was at the beach than at the pool because it was shadier at the  OPTIONS:
- beach .
- pool .
complete: pool .
Tigers were chasing the tourists and unfortunately they managed to pounce on Rebecca although Christine outran them. The slower runner was 
OPTIONS:
- Rebecca .
- Christine .
Rebecca .
Problem: Continue the following story.

Katrina gave Christine a stuffed animal for their birthday, but 
OPTIONS:
- Katrina already had this one.
- Christine already had this one.
Here's how I want to continue it:
Christine already had this one.