Traditional art and modern art, both part of the cultural frame of reference of most Americans and Europeans, share many aspects of the artistic language.

(A) both part of the cultural frame of reference of most Americans and Europeans

(B) are both part of the cultural frame of reference of most Americans and Europeans

(C) part of both the cultural frame of reference of most Americans and Europeans

(D) being part of the cultural reference frame of most Americans and Europeans

(E) have both been part of the cultural frame of reference of most Americans and Europeans