Monopolistically competitive markets feature heterogeneous products

Refer to Figure 4-5. The figure above represents the market for pecans. Assume that this is a competitive market. If the price of pecans is $3, what changes in the market would result in an economically efficient output?

A) The price would increase, the quantity demanded would decrease, and the quantity supplied would increase. B) The price would increase, the demand would decrease, and the supply would increase. C) The price would increase, the quantity supplied would decrease, and the quantity demanded would increase. D) The quantity supplied would increase, the quantity demanded would decrease, and the equilibrium price would increase.

The Heckscher-Ohlin Theorem predicts

A) who benefits and who loses from trade. B) which factors are abundant. C) the income distribution effects of trade. D) which goods will be exported.