The System That Provides Common Industry Definitions for Canada,Mexico,and the United

The system that provides common industry definitions for Canada,Mexico,and the United States,which makes it easier to measure economic activity in the three member countries of the North American Free Trade Agreement (NAFTA) ,is referred to as the

A) Standard Industrial Code System (SICS) .
B) United Nations Central Product Classification System (UNCPCS) .
C) National Codes of Industry System (NCIS) .
D) North American Industry Classification System (NAICS) .
E) Federal System of International Organizations (FSIO) .