Problem: Natalie must begin a strict diet and exercise regimen while Laura gets to slack off a bit because

My choice: Laura isn't the slightest bit overweight.

Problem: Derrick's garden makes him a little money, while William's makes a lot, so

My choice: Derrick is more likely to be the novice farmer.

Problem: Brett wanted to drive on Eric's car, but it had a flat tire.

My choice: Brett was disappointed.

Problem: Jason was unable to go to the store by himself unlike William, due to the fact that

My choice:
William is healthy.