Although he had been many times given the caveat emptor, Feldman purchased paintings and______in quantity, often without______them first.（）

A、 Theirs is a sterile, abstract practice, unlikely to produce few lasting works.
B、 They have demonstrated that critics are less important to the art-making process than the public commonly believes.
C、 They have laudably focused their energy on exposing the extent to which theory informs their own practice.
D、 They have, to the detriment of their work, lost track of inner realm of the creator.
E、 They have demonstrated a positive alternative to critics who have abandoned their field to become artists.

A、 reduce the level of control artists have over artistic institutions
B、 increase the usefulness of creating a unifying artistic vocabulary
C、 permit a greater level of development of knowledge concerning both
D、 curtail interactions and establish false boundaries between the two fields
E、 complicate the educational process of artists in an unfortunate manner