How Does Privatization Help Stimulate Gains in Economic Efficiency

How does privatization help stimulate gains in economic efficiency?

A) By providing subsidies to newly privatized firms to shield them from outside competition and by raising barriers to FDI.
B) By giving new private owners the reward of profits for searching for increases in productivity,entering new markets,and exiting losing ones.
C) By allowing newly privatized firms monopoly over a particular industry.
D) By encouraging the practice of state-controlled price regulation.