n the context of the parameters for collective bargaining, which of the following statements is true of mandatory items? a. almost anything is negotiable under mandatory items if both the negotiating parties agree to discuss it. b. mandatory items include a clause in the labor contract specifying that the employee union promises not to strike. c. if either negotiating party expresses a desire to negotiate one or more mandatory items, then the other party must agree. d. mandatory items include the union having veto power over the promotion of certain managers to higher-level positions.