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Which of the following is correct about foreign relations of Canada?
A.
The year 2020 marks the 50th anniversary of the establishment of Canada-China diplomatic relations.
B.
In 2018, relations between Canada and China got damaged under the trade war.
C.
The Canadian-American relationship is important and unique.
D.
The major influence on Canada’s participation in the international system is its history.
E.
Canada and the U.S. share the longest undefended border in the world.