20 According to the passage, what is the reason for the existence of hack work?
(A)provincialism
(B)morale of the artists
(C)the quality of art
(D)market demands
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統計: A(0), B(0), C(2), D(1), E(0) #2083374
統計: A(0), B(0), C(2), D(1), E(0) #2083374