[Q]: How does the sentence end?

On their visit yesterday Jeffrey said the lack brushing Ian teethe had caused the to become brittle,
OPTIONS:
- Jeffrey is a dentist.
- Ian is a dentist.

[A]: Jeffrey is a dentist.

[Q]: How does the sentence end?

Robert smokes and Leslie doesn't smoke so
OPTIONS:
- Robert bought nothing at the cigar shop yesterday.
- Leslie bought nothing at the cigar shop yesterday.

[A]: Leslie bought nothing at the cigar shop yesterday.

[Q]: How does the sentence end?

Joel was a romantic unlike Robert, so
OPTIONS:
- Joel was the one that developed a crush on a fellow classmate.
- Robert was the one that developed a crush on a fellow classmate.

[A]:
Joel was the one that developed a crush on a fellow classmate.