Division of labor was a
method of production to increase efficiency
method of paying workers for each finished product
method of discouraging union activity

c it says nothing about connecting those 2 seas.

most people now work in jobs where they do one  kind  of work; they are carpenters, bankers, cooks, mechanics, and so forth. likewise, most  businesses produce  only certainkinds  of  goods  or  services, such as cars, tacos, or gardening  services. this feature of  production  is known as specialization.