If the Initial Allocation of Goods Is Not Efficient, Consumers

If the initial allocation of goods is not efficient, consumers will:

A) not be able to trade goods and achieve Pareto efficiency.
B) buy and sell goods at market prices until the marginal rate of substitution is equalized across all consumers.
C) be required to consume somewhere along their contract curve.
D) change their tastes and preferences via their utility function to match the market's marginal rate of substitution.