Based on the ______ that every business is now free to formulate its own strategy in light of the changing market, I would predict a market improvement in the efficiency of China's economy.

A．presiding
B．circulating
C．floating
D．prevailing

A．During the 1970's, old buildings in many cities were recycled for modern use.
B．Recent interest in ecology issues has led to the cleaning up of many rivers.
C．The San Antonio example shows that bulldozers ate not the way to fight urban decay.
D．Strong government support has made adaptive rehabilitation a reality in Boston.