All else being equal, what happens to the unit contribution margin and the contribution margin ratio if the sales price per unit increases?

All else being equal, what happens to the unit contribution margin and the contribution margin ratio if the sales price per unit increases? Select one: a. Unit contribution margin increases and contribution margin ratio decreases. b. Both unit contribution margin and contribution margin ratio are unchanged. c. None of the given answers. O d. Both unit contribution margin and contribution margin ratio decrease. e. Unit contribution margin decreases while contribution margin ratio increases. Clear my choice