Which of these helped make the middle colonies successful? O A. Family-owned farms O B. Slave labor done by natives O C. Cool summers with little rain D. Equal rights for women

i am sure the answer is d

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.