Problem: Sarah wanted to get in shape like Amy, so

My choice: Sarah asked them for their workout plan to use.

Problem: Nick had a smaller dog than Craig because

My choice: Craig fed their dog much more food.

Problem: Kayla did amazing on the exam compared to Elena, due to

My choice: Elena being unprepared for it.

Problem: So

My choice:
Christopher ignored the website because Kevin needed some information that Christopher didn't need and that's why.