It can be inferred that blues really became a musical pattern of its own right______A.in t
It can be inferred that blues really became a musical pattern of its own right______
A.in the 1920s and 1930s when it evolved into classic "city" blues
B.in 1912 when it entered the range of popular song
C.in 1940s when some modem musical instruments were used
D.in the 19th century when black American songs were widespread