Problem: Jennifer asked Rachel what color the trousers were trimmed with, but

My choice: Rachel didn't know.

Problem: Amy was better at learning than Carrie, so

My choice: Amy didn't have to worry about failing the test.

Problem: Mary is in bad health unlike Katrina so

My choice: Katrina doesn't worry about eating more fruits and vegetables.

Problem: Amy comforted Katrina after the traumatic event.

My choice:
Katrina appreciated the help from their friend.