The passage cites examples of Sakip Sabanci's and Dominique de Menil museums to ______.
A.
prove how private collectors enrich arts collection and flatten geographical hierarchies
B.
show the symbolism of the private museums and the aesthetic transformation of a nation
C.
explain the fact that the rush of private museums is destabilising the art landscape
D.
exemplify the nowadays crisis of shrinking art resources and growing demand