The Demand Curve for a Good Is Given by P

The demand curve for a good is given by p = 160 - 6q, where p is the price and q is the quantity of the good. Suppose that the number of consumers in the economy doubles; a "clone" of each consumer, who has exactly the same demand curve as the original consumer, appears. The demand curve for the doubled economy is described by

A) p = 320 - 6q.
B) p = 320 - 12q.
C) p = 160 - 12q.
D) p = 160 - 3q.
E) p = 80 - 3q.