Definition: You are given a question on jurisprudence. Jurisprudence is the theory or philosophy of law. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Which of the following arguments against the 'fair play' argument in support of a duty to obey the law is the most persuasive?
(A)Fairness is a relative term. (B)The legal system is, in fact, unfair. (C)It sets a bad example. (D)The law is irrational and ambiguous.

B