In which of the following were Beiderbecke and Armstrong similar

A．Due to environmental influences, the music of black and white artists must be very different.
B．Due to its result of thought, Mack artists' music can be learned by white musicians.
C．Because jazz is created on inspiration, it is difficult for musicians to copy each other.
D．Because music has social significance, its influence on black white relations should not be underestimated.

A．Jazz places more emphasis on Afro-American culture than does the blues.
B．Jazz changes the attitudes of white musicians toward Afro-American culture.
C．Jazz is based on the blues attitude, but expressed in comprehensible manners to white musicians.
D．Jazz must be understood in order to be played, whereas the blues must be learned.