Problem: Continue the following story.

Amy was in charge of the research into Christine's condition, so 
Here's how I want to continue it: Christine felt hopeful for the solution.

Problem: Continue the following story.

Dennis always had a very clean house while Donald did not because cleanliness was not important to 
Here's how I want to continue it: Donald .

Problem: Continue the following story.

Treating muscle cramps didn't work for Jason but did for Derrick because 
Here's how I want to continue it:
Jason had no medical knowledge.