Answer:
(B) Contribution margin ratio increase, Break even point decrease
Explanation:
Effect on Contribution margin ratio
Contribution = Selling Price - Variable Cost
From the formula it can be seen that Fixed Cost element does not have an effect here
If the variable costs decrease, the contribution increase.Which consequently increases contribution margin ratio
Contribution Margin Ratio = Contribution/Selling Price
Effect on Break even point
Break Even Point = Fixed/Contribution per unit
Both the Fixed cost element and the Variable cost element has an effect
If the fixed costs decrease, while the contribution increase, Break even point in decrease.