Which of the Following Statements Are True? When Marginal Cost

Multiple Choice

Which of the following statements are true? When marginal cost exceeds average total cost:
(i) average total cost must be rising
(ii) average variable cost must be rising
(iii) average fixed cost must be rising

A) (i) only
B) (i) and (ii)
C) (ii) and (iii)
D) (i) , (ii) and (iii)