Assume a Firm Purchases Resources a and B Under Purely

Multiple Choice

Assume a firm purchases resources a and b under purely competitive conditions and combines these resources to produce X. Product X is sold in a purely competitive market. The MPs of a and b are 6 and 3, respectively, and the prices of a and b are $12 and $6, respectively. If profit-maximizing equilibrium exists, the price of X will be

A) $1.
B) $0.5.
C) $2.
D) $5.