Problem: How does the sentence end?

Robert has to stock up on diapers and wipes even though Ian doesn't because 
Answer: Robert just added a baby to their household.

Problem: How does the sentence end?

The model chose to act in a movie rather than a commercial because the 
Answer: commercial paid less money.

Problem: How does the sentence end?

Kevin decided to use a polish instead of a stain for the wood because the 
Answer: polish looked sparkly.

Problem: How does the sentence end?

Matthew always had to beat Joel due to 
Answer:
Matthew wanting to win all the time against his sibling.