Problem: The scratches on Robert's car were able to come out compared to Ians, because

My choice: Robert scratches were shallower.

Problem: Steven applied for the position of Bingo Caller while Derrick did not because

My choice: Steven was a native speaker.

Problem: Samantha was able to successfully breed and sell several pairs of lovebirds but Sarah could not, because

My choice: Samantha was good at handling animals.

Problem: James cannot carry any more of the books, so he decided to carry some diskettes because the

My choice:
diskettes are lighter.