Problem: Angela was more prone to infection than Rachel because

My choice: Rachel had stronger lungs since childhood.

Problem: I loved my old comb better than my new brush, because the

My choice: brush is much flimsier.

Problem: Craig is excited to visit Randy in California because

My choice: Craig has never been to the state.

Problem: Nelson has some very red eyes, but Robert does not because

My choice:
Robert lives in a wet climate.