An Industry Is Characterized by Scale Economies and Exists in Two

An industry is characterized by scale economies and exists in two countries.In order for consumers of its products to enjoy both lower prices and more variety of choice

A) the two countries must engage in international trade with each other.
B) each country's marginal cost must equal that of the other country.
C) the marginal cost of this industry must equal marginal revenue in the other.
D) the monopoly must lower prices in order to sell more.
E) they must combine to become a multinational corporation.