On the Eve of the American Revolution, Social and Economic

On the eve of the American Revolution, social and economic mobility decreased, partly because

A) some merchants made huge profits as military suppliers.
B) restrictions were placed on admission to the guilds and professions.
C) fewer yeoman farmers were arriving from Europe.
D) the Ivy League colleges became more restrictive in admissions.
E) slavery concentrated wealth in a few wealthy planters' hands.