[Q]: How does the sentence end?

Kenneth thought a drone was a fun toy but Derrick did not. 
OPTIONS:
- Kenneth went to Best Buy and bought a drone.
- Derrick went to Best Buy and bought a drone.

[A]: Kenneth went to Best Buy and bought a drone.
QUES: Continue writing.

Avery went to the beach but stayed in the sand instead of getting in the water because the 

OPTIONS:
- water was cold.
- sand was cold.
+++++++++
ANS: water was cold.
Problem: How does the sentence end?

Logan spent days organising the event that Justin was going to attend, because 
OPTIONS:
- Logan was a conference participant.
- Justin was a conference participant.
Answer: Justin was a conference participant.
sentence: Because Natalie likes birds and Elena prefers dogs,  OPTIONS:
- Natalie went to the store and bought a dog as a pet.
- Elena went to the store and bought a dog as a pet.
complete: Elena went to the store and bought a dog as a pet.
She didn't care about being as popular at school as she was at church, so at the 
OPTIONS:
- school she had very few friends.
- church she had very few friends.
school she had very few friends.
Problem: Continue the following story.

William was responsible with energy consumption, but Steven was wasteful for the reason that 
OPTIONS:
- William was environmentally responsible.
- Steven was environmentally responsible.
Here's how I want to continue it:
William was environmentally responsible.