The Bank of Canada Has Formally Adopted an Inflation Target

The Bank of Canada has formally adopted an inflation target of 2 percent. One important reason for this is

A) that economists have determined that only an inflation rate of 2 percent is consistent with NAIRU.
B) to allow for a permanent inflationary gap which is beneficial to the economy.
C) the supply- shock inflation will never exceed this amount.
D) that output- gap inflation will never exceed this amount.
E) to avoid the temptation of validating positive economic shocks that could lead to accelerating inflation.