Which of the following statements are true? 1. If the activity level increases, then one would expect the fixed cost per unit to increase as well: 19. A fixed cost is a cost whose cost per unit varies as the activity level rises and falls. III. A decrease in production will ordinarily result in a deciease in foxed production costs per unit. Multeple Choice. Ony statement ilis true. Only statement ill is true Statements I and lire trie. Statements I and at are true