The Diamond of National Competitive Advantage summarizes

A. minor cost variations from country-to-country (as concerns production, distribution, sales and marketing, and other primary components of the industry value chain), and minimal cross-country trade restrictions.

B. the four major factors that describe the nature of the business environment including demand and factor conditions, related industries, and firm strategy.

C. the elements of the competitive environment to be applied in each country.

D. the factors in global-market leadership and competitive strategy and positioning.