Problem: The man handed the important folder to Ryan and not Brian because

My choice: Ryan was experienced in the situation.

Problem: Samuel got more sleep the previous night than Randy, because

My choice: Randy was always a very light sleeper.

Problem: Donald was unable to restore the files to Nelson's computer after they were deleted, so

My choice: Nelson gave no payment.

Problem: Eric was better at cooking chicken than Ryan because

My choice:
Eric spent a lot of time reading recipes.