Problem: Of the two, Robert is less intelligent than Brian is. That's because

My choice: Robert dropped out of college.

Problem: The doctor told Samantha they were healthy but Laura they were overweight.

My choice: Laura rarely ate a balanced diet.

Problem: The flood overran the town but did not hurt the camp, since the

My choice: town was surprised by the sudden rain.

Problem: Jennifer prefers food cooked in a cast iron skillet, but Megan does not, because

My choice:
Megan dislikes the way the food tastes.