Which of the Following Statements Is Most Accurate

Which of the following statements is most accurate?

A) Some companies use mobile marketing to reach geographic concentrations of ethnic groups on their smartphones or tablet devices.
B) Most consumer packaged good firms have now moved their advertising accounts from multicultural agencies to their own in-house advertising agency to realize greater marketing efficiencies.
C) Most companies have failed to encourage their advertising agencies to develop cross-cultural campaigns with messages that reach all ethnic groups.
D) Since racial and ethnic groups tend to be equally dispersed throughout the United States, multicultural marketing programs need not be developed.
E) Due to the "melting pot" effect, racial and ethnic groups in the United States tend to have very similar attitudes, communication preferences, and lifestyles, which means that they will respond similarly to advertising messages.