Which of the following statements is incorrect?

a. Foreign firms generally have lower concentrations of ownership compared to U.S. firms.

b. One reason domestic firms "go global" is to sell products in new markets.

c. Often firms can avoid regulatory hurdles that apply to foreign manufacturers by establishing operations in the country where the hurdles apply.

d. A difficulty associated with doing business in international markets is that not all countries have the same currency.

e. Cultural differences among countries make it difficult for a multinational firm to use the same marketing strategythat is, packaging, advertising, and so forthin every country in which it operates.