The audience for the new opera, an inventive rendition of Wagner's Tristan and Isolde, was clearly enthralled by the show for the attendees paused for some moments before applauding vigorously at its conclusion.

(A) was clearly enthralled by the show for the attendees

(B) were clearly enthralled by the show for they

(C) were clearly enthralled by the show as they

(D) was clearly enthralled by the show for they

(E) was clearly enthralled by the show as is clear since its attendees

OA [spoiler](A)[/spoiler]