The tone of the author's discussion of the blues is ______.

A．the attitudes of blacks and whites as reflected in their music are different
B．Beiderbecke's intellectualism held back his development as a musician
C．rebellion acted as a destructive force on Beiderbecke's performance
D．Armstrong was well established as a performer but Beiderbecke was not

A．France put the money into producing luxurious articles
B．France government didn't encourage the development of industry
C．the merchants arid businessmen were not willing to finance the industry
D．the aristocratic group were not willing to develop industry