please help 3 (c) the statement is true false or uncertain. please state the reason to support it

1. True, False, Uncertain (60 points) In each question, please select whether the state- ment is True, False or Uncertain. State the reasons to support your argument. (a) (10 points) True/False/Uncertain: In Friedman's Role of Monetary Policy paper, he claimed that monetary policy cannot be used to control interest rates and infla- tion. (b) (10 points) If taxes are thought of as being a reduction in income, then, using the principle of permanent income hypothesis, taxing labor income a lot but just once is better than taxing a small amount forever. (c) (10 points) According to Milton Friedman, when one factors in peoples expectation, then we will always have a constant level of output and higher price level, given that inflation is present and the central bank does not increase the money supply