In General, the Bank of Canada Has NOT Embraced a Fixed-Growth-Rate

Multiple Choice

In general, the Bank of Canada has NOT embraced a fixed-growth-rate monetary policy.Why is this the case?  

A)  because the Bank of Canada directors would lose their jobs if a fixed-growth-rate monetary policy was adopted 
B)  because no influential economists have yet come out in favour of a fixed-growth-rate monetary policy 
C)  because the Bank of Canada prefers active fiscal policy 
D)  because the Bank of Canada directors believe the economy is too complex and too changeable to make a fixed-growth-rate monetary policy work consistently