【单选题】If cost behaviour stays the same but sales volume increases 20%, what will happen to break-even point in revenue dollars and to margin of safety revenue dollars?
A.
Break-even sales remain the same with margin of safety increasing
B.
Break-even sales increaes but margin of safety remains the same
C.
Break-even decreases with margin of safety decreasing
D.
Break-even sales and margin of safety remain the same