______ is the capital of Scotland since the 15^th century.

A．American blacks wrote the first blues song
B．Handy composed the song "Dallas Blues"
C．the blues became popular in U.S.
D．Instrumental blues appeared

A．It brought blues back to Europe
B．It spread blues to the world
C．The blues became shared by American soldiers both from south and north
D．It made the blues become the important element in abolishing segregation among American soldiers