If Regulators Set Price Equal to Marginal Cost for the Natural

If regulators set price equal to marginal cost for the natural monopoly inExhibit 15­3, then from the usual profit­maximizing position, price changesfrom

A) $24 to $18, and quantity increases from 5 to 8
B) $14 to $20, and quantity increases from 5 to 8
C) $24 to $18, and quantity remains unchanged
D) $24 to $18, and quantity increases from 5 to 8.
E) $24 to $22, and quantity increases from 5 to 10