Problem: Jeffrey looked throughout the whole house to get rid of the bugs for Matthew's sanity because 

My choice: Matthew was a homeowner.


Problem: Randy had an easier time travelling in Paris than Dennis because 

My choice: Randy can speak fluent French.


Problem: Lawrence asked Steven to send mortgage check to the bank because 

My choice: Lawrence forgot to do so.


Problem: Craig has to read a lot more contracts than Christopher because 

My choice:
Craig is a lawyer's assistant.