He greatly improved existing stream engines for use in factories
The best statement to complete the diagram is that African Americans migrated to obtain jobs in northern factories.
<h3>Why were African Americans able to get jobs?</h3>
WWI had drained the nation of the manpower needed to sustain industrial production. This manpower however, had mostly been White people.
With them being in shortage on account of joining the army, African Americans were able to take their place and moved to the North to work in factories.
In conclusion, option B is correct.
Find out more on labor shortage in WWI at brainly.com/question/404503.
At the Elbe River, April 25th, 1945.
An endergonic reaction is a type of reaction that is determined by the sign of the Gibbs energy of the reaction. Gibbs energy is related to the degree of the substances to react freely. an enrgonic reaction refers to ∆G that is positive. The answer therefore to this problem is A