Which of the following statements is not true about Milton Friedman？( )
选项：

A:One of his famous quotes is: There is no such thing as a free lunch.
B:One of the most influential economists of the second half of the 20th century.
C:He is the second-most popular economist of the 20th century following only John Maynard Keynes
D:He says, Consciousness as consciousness of consciousness.