Answer:
Correct answer is D, Unit variable cost remains and unit fixed cost decrease
Explanation:
The relationship between sales volume and unit fixed cost is inverse. Which means, the larger the volume increase of sales, the smaller the unit cost fixed cost in the period. No matter how much is the increase in sales, the total fixed cost REMAINS, that is why it affects only on per unit cost. VARIABLE UNIT COST on the other hand, is constant and will never be affected on the increase in sales volume. The relationship between total variable cost and sales is directly proportional.