Modern economics that attempt to remove the government from economic decisions and allow business to operate freely reflect the theories of ___ A. John Maynard Keynes
B. Thomas Robert Malthus
C . Milton Friedman
D. Karl Marx

Milton Friedman

Explanation:

John Maynard Keynes called for the increase in government participation in the economy in order to reduce depression, increase full employment and increase the standard of living of the people.

Thomas Robert Malthus was well known for his population theory where he stated that it'll get to a point where human population will be more than the food produced and this will lead to war, disease, famine etc

Milton Friedman main work in an economy, there should be free trade, and little or no intervention from the government as business should freely operate.

Karl Marx argues that every society has two main classes which are the capitalists and labor. He further said that the business owners are the capitalists and that they exploit the laborers who work for them.

Based on the above explanation, the correct answer is Milton Friedman.

to act quickly in times of danger to the united states

because you have to act quickly if you want to live/survive.