Correct Answer:
C. Illicit
The correct answer is Illicit. The word "unlawful" means not allowed by law; illegal. A synonym is a word with a similar meaning. Among the options:
- Legal: This is an antonym (opposite) of unlawful, not a synonym.
- Fair: Means just or reasonable, not related to legality.
- Illicit: Means forbidden by law or rules; it is a direct synonym for unlawful.
- Just: Means morally right and fair, not a synonym for unlawful.
Hence, the correct synonym is "Illicit".