Aesthetic thought of a distinctively modem bent emerged during the 18th century. The western philosophers of this time devoted much attention to such matters (31) natural beauty and representation. (32) that time, however, the philosophy of art has become ever more (33) and has begun to (34) the philosophy of nature. Various issues (35) to the philosophy of art have had a (36) impact (37) the orientation of 20th century aesthetics. (38) among these are problems relating to the theory of art as form and (39) the distinction between representation end expression. Still another question has to do with the value of art. Two opposing theoretical positions (40) on this issue: one holds that art and its appreciation are a means to some recognized moral good, (41) the other maintains that art is intrinsically valuable end is an end in itself. Underlying this whole issue is the concept of taste. In recent years there has also been an increasing (42) with art as the prime object of critical judgment. Corresponding to the trend in contemporary aesthetic thought, (43) have followed (44) of two approaches. In one, criticism is restricted to the analysis end interpretation of the work of art. (45) , it is devoted to articulating the response to the aesthetic object and to (46) a particular way of perceiving it. Over the years, aesthetics has developed into a broad field of knowledge end inquiry. The concerns of contemporary aesthetics include such (47) problems as the nature of style and its aesthetic significance; the relation of aesthetic judgment to culture; the (48) of a history of art; the (49) of Freudian psychology and other forms of psychological study to criticism; and the place of aesthetic judgment in practical (50) in the conduct of everyday affairs.

A. have brought
B. have been brought
C. have taken
D. have been taken