Problem: Emily explained to Amy that she was finally going to take up piano lessons this time.

My choice: Amy was skeptical.

Problem: The seeds that William uses are worse than Adam's although

My choice: Adam went to a less reputable farmer.

Problem: Erin was more concerned about an infection than Katrina because

My choice: Katrina had a robust immune system.

Problem: The man with cancer chooses surgery over chemo based on his doctor's advice.

My choice:
chemo must fail more in cases like his.