Problem: Mowing the grass is more tedious for Adam than Derrick because 
OPTIONS:
- Adam has an old push lawnmower.
- Derrick has an old push lawnmower.

My choice: Adam has an old push lawnmower.
[Q]: How does the sentence end?

The girl chose to clean out the closet, but not the garage, due to the 
OPTIONS:
- closet being very clean.
- garage being very clean.

[A]: garage being very clean.
QUES: Continue writing.

Derrick lost weight more slowly than Robert because 

OPTIONS:
- Derrick only exercised about once a week.
- Robert only exercised about once a week.
+++++++++
ANS: Derrick only exercised about once a week.
Problem: How does the sentence end?

Donald led the group and Neil followed it, so 
OPTIONS:
- Donald was the one who accepted the decisions.
- Neil was the one who accepted the decisions.
Answer: Neil was the one who accepted the decisions.
sentence: Amy was able to catch their sickness earlier than Carrie because  OPTIONS:
- Amy didn't have telltale symptoms.
- Carrie didn't have telltale symptoms.
complete: Carrie didn't have telltale symptoms.
Input: Continue writing.

We decided chemistry would not be the topic for the article, and chose biology instead, as the 
OPTIONS:
- chemistry was irrelevant to the current studies.
- biology was irrelevant to the current studies.

Continued:
chemistry was irrelevant to the current studies.