The correct answer is A. they are synonyms. Synonyms are words which have the same meaning - wary and hesitant both refer to caution, which means they have the same or similar meanings, which makes them synonyms. Antonyms have the opposite meaning (love and hate); homonyms are words which are written the same, but don't have the same meanings (bear (an animal) and to bear (to endure)); homophones are words which are read the same (two and too).
In general, blogs are considered unreliable scholarly sources because many are strongly opinionated and can lack the professionalism expected in a scholarly source.
