Because of the wide variety of people
Samuel Adams hepled establish the committee.
A caste system<span> is a class structure that is determined by birth. it means that in some societies if your parents are poor, your gonna be poor too.</span>
I have chose primary source to be the answer. Check out the definition of "primary source." secondary wouldn't make sense here.
I think it is D because transportation helped people go to far away places, and manufacturing produces goods.