In 1931 by（）Canada was formally declared to be a sovereign nation and became a member of the Common-wealth of Nations.

A.Ontario and Quebec
B.Manitoba and British Columbia
C.Alberta and Saskatchewan
D.Newfoundland and Prince Edward Island

A.the Conservative Party
B.the Liberal Party
C.the Labor Party　
D.the New Democratic Party

A.Sir John Macdonald.
B.Sir Wilfrid Laurier.
C.Robert Borden.
D.Mackenzie King.