单项选择题
A．wrote seven million songs B．sold seven million copies of his songs C．wrote seven songs D．sold seven million copies Of his seven songs
A．Country music style and the musical style of the Southeastern states. B．The musical styles of the Southwestern states and the Southeastern states. C．The Southwestern musical style and Texas musical style. D．The styles of blues and the black rural dance musi
A．1920s B．1930s C．1940s D．1950s