The government of country a has lowered taxes to allow citizens to bring home more money in every paycheck. this is an example of . the government of country b has decided to stop trading with outside nations in the hope of boosting demand for domestic goods. this is an example of . the government of country c has created protections for employees within factories to ensure their physical safety. this is an example of .

Country A: Fiscal

Country B: Trade

Country C: Regulatory

County A fiscal policy. This is relating to money, taxes, debts etc that are owned and managed by the government. Fiscal policy is the instrument by which a government regulates its spending levels and tax rates to control and influence a nation's economy. In this case, the taxes are modified to regulate the economy.  

County B trade. This is an elementary economic concept relating the buying and selling of goods and services, with reward paid by a buyer to a seller, or the exchange of goods or services between parties. In the example, it has been stopped the trade of foreign domestic goods.  

County C regulatory policy. Its objective is to bound what can be done in the marketplace. Most governments have some regulations casing a diversity of areas, including: financial businesses, safety, minimum wages, etc. in this case, the government regulates the employees conditions.  

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explanation:

john maynard keynes developed new economic theories in response to the : b) great depression of the 1930s. his theories are so important that they are known as "keynesianism". in his works he supports the idea of a government with deeper involvement and intervention to end the great depression.