With Reference to Collective Bargaining, Which of the Following Statements

With reference to collective bargaining, which of the following statements is TRUE regarding a permissive item?

A) If either party involved in collective bargaining requests to include a permissive item in the bargaining then that factor must be bargained in good faith.
B) A legal impasse in negotiations occurs only when the parties cannot agree on a permissive issue.
C) Severance pay is a permissive item for collective bargaining.
D) If one party refuses to negotiate a permissive item, the other party cannot claim bad-faith bargaining.