[Q]: How does the sentence end?

Randy listened to Kevin explain how to use the software because 
OPTIONS:
- Randy was an expert.
- Kevin was an expert.

[A]: Kevin was an expert.


[Q]: How does the sentence end?

Justin showed Joseph his old high school track and field records.  
OPTIONS:
- Justin was athletic.
- Joseph was athletic.

[A]: Justin was athletic.


[Q]: How does the sentence end?

Elena dyed Katrina's hair in a bright red and green colour, because 
OPTIONS:
- Elena is extravagant.
- Katrina is extravagant.

[A]:
Katrina is extravagant.