In September 2007,reversing Its Course,the Bank of Canada Began a Series

In September 2007,reversing its course,the Bank of Canada began a series of:

A) interest rate increases,reversing its previous policy of lowering interest rates to fight the financial crisis.
B) interest rate increases to combat inflation.
C) cuts in the reserve requirements,reversing its previous policy of increasing the reserve requirement,to stop bank failures.
D) cuts in the overnight rate to lower interest rates,thus reversing its previous policy of raising interest rates,to fight the financial crisis.