GRE Reading Comprehension: Manhatton-GRE阅读Manhatton - 5NU4I0VG91D_HYX5A$

The passage cites all of the following as reasons for the inclusion of operatic elements into the rock music genre in the 1970's EXCEPT: A. Changes in concert equipment changed the way shows could be delivered. B. Pink Floyd's dramatic staging served to promote an influential album. C. Shifts in the content of the music contributed to the songs having a more "story-telling" quality. D. One medium through which rock songs had typically been delivered to the public became less conducive to the genre. E. Artists altered their performances to reflect changes in the modern concert ambiance.