Economic opportunities to work in factories during and after World War II, was the main cause for the trend shown in the graph during the 1940s and 1950s, as shown in image.
What is graph?
The connections between the lines and the points in a network can be seen mathematically as a graph.
It was vital to attract foreigners to fill these vacancies and maintain American production, since the industries and enterprises were left with a low number of workers.
As a result, option (b) is correct.
Learn more about on graph, here:
https://brainly.com/question/16608196
#SPJ2
