Please help:
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.