Which of the following is a true statement?

A. A statement made by the labor union that it will select the low wage is Firm credible. Automation Manual B. In the subgame perfect Nash equilibrium, the Union Union outcome is efficient. C. Automation is a dominant High Low High Low strategy for the firm. D. If the order of moves is (4,2) (5,1) (-2, 6) (8,4) reversed, the subgame perfect Nash is efficient