Story needs to be completed:
Christopher got to the store faster than Donald although 
OPTIONS:
- Christopher rode on a horse instead of walking.
- Donald rode on a horse instead of walking.

My choice:
Donald rode on a horse instead of walking.
Problem: Continue the following story.

Growing succulents indoors suited Patricia but not Samantha because 
OPTIONS:
- Patricia had what is known as a green thumb.
- Samantha had what is known as a green thumb.
Here's how I want to continue it: Patricia had what is known as a green thumb.
Problem: Rachel ignored the cockatiel soon after getting it which left Erin to care for it because 
OPTIONS:
- Rachel is responsible.
- Erin is responsible.

My choice: Erin is responsible.
[Q]: How does the sentence end?

Robert was experienced in the kitchen unlike Derrick, so 
OPTIONS:
- Robert was able to cook dinner for guests with confidence.
- Derrick was able to cook dinner for guests with confidence.

[A]: Robert was able to cook dinner for guests with confidence.
QUES: Continue writing.

Rita used the nail polish on her nails instead of the glue, because the 

OPTIONS:
- polish looked dull when it dried.
- glue looked dull when it dried.
+++++++++
ANS: glue looked dull when it dried.
QUES: Continue writing.

It took longer for Hunter to install the flooring than it took Benjamin although 

OPTIONS:
- Hunter was a carpenter.
- Benjamin was a carpenter.
+++++++++
ANS:
Hunter was a carpenter.