Which of the following is an example of a primary source?

a. a diary entry from a german homemaker in 1933
b. an academic article explaining the importance of the cold war
c. an interview with a historian about the reagan presidency
d. a novel set in the american colonies

What was one of the advantages that the united states had over europe regarding the industrial revol the united states had a continuous supply of potential factory worker the united states imported workers from europe to work in factories. the workers in the united states were more skilled than the workers in europe the united states didn't actively participate in the industrial revolution. instead they imported most of their goods from other countries.