Problem: How does the sentence end?

Jeffrey remembered to wear their athletic cup while sparring but Dennis forgot. 
Answer: Dennis had severe problems with a groin kick.

Problem: How does the sentence end?

During the concert, Leslie signed Justin's shirt with a pen since  
Answer: Justin was a fan.

Problem: How does the sentence end?

Katrina's car uses ethanol, while Laura drives a traditional vehicle, so 
Answer: Katrina probably cares about the environment more.

Problem: How does the sentence end?

When one experiences cramps they can get into a warm bath or use a heating pad, but the 
Answer:
heating pad is more convenient.