:2) which of the following is a major contribution of economist friedrick hayek? select one: a. wrote "the wealth of nations" and advocated for laissez faire b. explained why central planning undermines human liberty and, if pursued far enough, will lead to tyranny; told how the essential institutions of a free society develop without central planning c. stressed the importance of the quantity of money as an instrument of government policy and as a determinant of business cycles and inflation.