Problem: How does the sentence end?

Unlike Craig, William avoided getting a cramp during the marathon, because 
Answer: William stretched inadequately beforehand.

Problem: How does the sentence end?

Liam liked cleaning his ears with solution instead of a qtip because the 
Answer: qtip was harsher.

Problem: How does the sentence end?

The cruise itinerary was changed to replace the movie with the musical, as the 
Answer: musical was skyrocketing in popularity.

Problem: How does the sentence end?

My relationships as a teen worked out far differently from my adult ones because the 
Answer:
teen ones were too immature.