please explain number23 in detail

Scenario 7.1: The average total cost to produce 100 cookies is $0.25 per cookie. The marginal cost is constant at $0.10 for all cookies produced. 21) Refer to Scenario 7.1. The total cost to produce 100 cookies is: A) $0.10 B) $0.25 C) $25.00 D) $100.00 E) indeterminate Answer: C Diff: 1 Section: 7.1 22) Refer to Scenario 7.1. The total cost to produce 50 cookies is: A) $20 B) $25 C) $50 D) $60 E) indeterminate Answer: A Diff: 3 Section: 7.1 23) Refer to Scenario 7.1. For 100 cookies, the average total cost is: A) falling. B) rising. C) neither rising nor falling. D) less than ayerage fixed cost