In the 1800s the United States had to two types of industrial workers, these were:
Craft workers were workers who had a specific set of skills and training while Common laborers were workers that lacked any kind of specialized training.
The main difference between these two was that Craft workers earned more and had more control over their working hours because of their skillset than the common laborer.
I believe the answer is Transportation Innovations
The answer is B rates of literacy in Europe
The attack of two U.S. destroyers by the North Vietnamese. The United States refused to trade with Cuba. that's what caused the united states to enter into a full-scale war in Vietnam. Hope this helps :D