Problem: Leslie had better grades than Derrick because

My choice: Leslie spent more time studying than playing video games.

Problem: Craig lost the promotion at their current company to Nelson, because

My choice: Craig failed to show up on time.

Problem: Being a writer was something that came easily to Matthew but not Kevin because

My choice: Matthew had a communication degree.

Problem: Kenneth told Neil that he is building his own backyard fence.

My choice:
Kenneth is hardworking.