Answer:
C. Despite the fact that almost all economists agree that those policies are undesirable.
Explanation: In most countries of the world the governments have placed trade barriers and rent control policies, this is clearly against the view and believe of Economists who believe that the market for rent should be controlled by market force like DEMAND AND SUPPLY. Trade barriers have been imposed by governments everywhere, this barriers are aimed at preventing the sale,trade,import or export of certain products which are clearly against the view of economics.