Which one of the following statements is correct? O a. Avariable cost is a cost whose cost per unit varies as the activity level rises and falls. O b. None of the given answers is correct Oc. The...

Fast solve plz

Extracted text: Which one of the following statements is correct? O a. Avariable cost is a cost whose cost per unit varies as the activity level rises and falls. O b. None of the given answers is correct Oc. The total fixed cost depends on how many units are produced. O d. A decrease in production will ordinarily result in a decrease in total variable costs. O e. As activity decreases within the relevant range, fixed costs remain constant on a per unit basis.