The correct answer is letter A. Economic efficiency can be stimulated in a country by a government through deregulation and DECENTRALIZATION.
Decentralization is the transfer of authority from the central government to the local government. When this happens, the central government is empowering the local government to boost their economies. This decision may also decongest the economic boom in small areas and dissipate the opportunity to other rural areas giving a lot of people enough opportunities and chances for work and economic growth.