Story needs to be completed:
Justin won many more races than Jason was able to win because 
OPTIONS:
- Justin had shorter legs.
- Jason had shorter legs.

My choice:
Jason had shorter legs.
Problem: Continue the following story.

Craig saw that Dennis was nervous for the exam. 
OPTIONS:
- Craig was very confident he had studied enough.
- Dennis was very confident he had studied enough.
Here's how I want to continue it: Craig was very confident he had studied enough.
Problem: Laura gave birth to twins and Tanya delivered them, so 
OPTIONS:
- Laura was sure to congratulate them when it was done.
- Tanya was sure to congratulate them when it was done.

My choice: Tanya was sure to congratulate them when it was done.
[Q]: How does the sentence end?

Nelson loved to decorate their house but Joseph did not. 
OPTIONS:
- Nelson received very many compliments on their home decor.
- Joseph received very many compliments on their home decor.

[A]: Nelson received very many compliments on their home decor.
QUES: Continue writing.

The flooring in the house was getting scuffed more easily than the garage floor because the 

OPTIONS:
- house has vinyl flooring.
- garage has vinyl flooring.
+++++++++
ANS: house has vinyl flooring.
QUES: Continue writing.

The journey over the hills was a lot less difficult than the trip through the woods, because the 

OPTIONS:
- journey was on an hard path.
- trip was on an hard path.
+++++++++
ANS:
trip was on an hard path.