Prior to the patriation of Canada's Constitution in 1982, what was required in order to amend the British North America Act, 1867 (BNA Act)?
A) The BNA Act could be amended by the Prime Minister of Canada with no involvement of the provinces or the United Kingdom, which allowed for changes without popular consent.
B) The BNA Act could be amended, but only if seven provinces, representing 50% of the population, of Canada agreed. If this threshold was met, an amendment would be adopted without any further requirements.
C) The BNA Act could only be amended by Parliament of the United Kingdom.
D) There was no way to amend the BNA Act.
E) The BNA Act could only be amended if the provinces held a constitutional conference and agreed to amendments, which would require the agreement of the Governor General.