The term Triad refers to the three richest regions of the world

The term Triad refers to the three richest regions of the world except ______.
A、the United States
B、the European Union
C、Japan
D、Canada
【正确答案】:D
【题目解析】:The term Triad refers to the three richest regions of the world the United States, the European Union and Japan that offer the most important business opportunities.参见教材P21。