Adam Smith's Observation That "The Greatest Improvements in the Productive

Adam Smith's observation that "The greatest improvements in the productive powers of labour, and the greatest part of the skill, dexterity, and judgment with which it is any where directed, or applied, seem to have been the effects of the division of labour" implies:

A) that economic growth will be highest the less countries trade with others.
B) that economic growth and international trade tend to expand together.
C) that economic growth is not related to international trade as some economists contend.
D) that trade will tend to retard economic growth because trade prevents the division of labor.