Which of the Following Is Not a Useful Guideline for U.S.-Based

Which of the following is not a useful guideline for U.S.-based direct marketers wishing to reach global customers?

A) Do not treat prospects as though they are Americans.
B) Do not automatically assume that a direct-mail campaign that works in one country will work in another country.
C) Do not assume that all Europeans are similar in their tastes and wants.
D) Customers should be able to return products to an address in their local country market.
E) Focus on all countries included in the European Union.