The earlier years of the middle ages began with
a. the crusades.
b. the collapse of the roman empire.
c. the renaissance.
d. the search for new trade routes.

answer: the third option is your answer

explanation:

b.

one company controls all the means of production of a product.

~coco

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.