No not all laws are fair to people there are some pretty good laws but not all are fair
The answer to the question "Which of the following sentences most clearly expresses an opinion?" is B.
This practice is divisive, it is unfair, it is archaic.
The word unfair is a key word to knowing that is in opinion, because there is no factual evidence to tell you that it is fair or unfair. Opinions can be backed by facts, but can not be proven.