If All of a Resource's Earnings Reflect the Opportunity Costs

If all of a resource's earnings reflect the opportunity costs of the resource,_____

A) the equilibrium price and quantity of that resource are determined by the intersection of the demand and supply curves in the product market.
B) the equilibrium price of that resource is zero.
C) the quantity of that resource is determined exclusively by supply.
D) the price of that resource is determined exclusively by demand.
E) the quantity of that resource is determined exclusively by demand.