Problem: Continue the following story.

The chlorine in the water bugged Megan more than it did Natalie, because 
Here's how I want to continue it: Natalie never had severe allergies.

Problem: Continue the following story.

Since the man was trying to stick to his financial plan, he purchased the sandwich instead of the burger because the 
Here's how I want to continue it: burger was expensive.

Problem: Continue the following story.

Maria's garden was much grander and better looking than Megan's because 
Here's how I want to continue it:
Maria was a professional gardener.