Use the information below to answer the question. Foreign computer manufacturers produce new desktop computers for export. As a result, U. S. computer manufacturers face new challenges in the marketplace.

Which statement BEST explains the consequence of these developments?
A. The growth of competition will lead to greater production costs.
B. The availability of substitutes will drive down the price of a product.
C. The size of the market will slow the progress of product innovation.
D. The expansion of consumer choice will strengthen demand for all products.