Which of the following statements concerning Adorno's musical criticism can be inferred from the passage

Adorno failed to account for rock 'n' roll as a musical form largely because it wasn't commercial enough.
B. His methodology was advanced on the whole, but failed to take into account enough categories of music to be comprehensive.
C. Adorno ignored non-pop music largely because he felt its cultural influence was negligible.
D. Adorno's greatest failure was in ignoring the music of non-capitalist societies.
E. Adorno's work was near-sighted largely because it focused on the primacy of radio and record, ignoring less popular means of transmitting music.