Which of the Following Is TRUE About American Regional Dialects

Which of the following is TRUE about American regional dialects?

A) There is no definitive answer to the number of regional dialects that exist in the U.S. because different studies use different criteria to draw boundaries
B) There are more regional dialects found on the West coast than on the East coast, due to settlement history and migration patterns
C) Current research suggests that American regional dialects are becoming more alike
D) Regional dialects are dying out due to traditional and social media influences
E) Although African American English is sometimes considered a social dialect, it should be categorized as a regional dialect due its development in the American South