The answer is a) Division of labor.
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Manifest destiny made it to where the united states and americans were trying to expand everywhere, this meant that Americans were also going into other countries land (especially Mexico's) A large group of farmers lead by John Austin made an agreement with Mexico to where they would bring mexicans amd farm Texas. They did not fully comply to all the rules in the agreement. Because the United States had land on the borders of Texas with a strong army and americans already in Texas they basically said this is our land amd started a war ending in the anexation of Texas.
Answer: Development as an excuse for imperialism.
Explanation:
Proponents of imperialism sought to justify their imperialist aspirations. Developed and powerful countries have always carried out imperialism over those who have not reached that development stage. Imperialism has always aimed to enrich itself at the expense of others. Yet to defend their aspirations, the imperialists have always pointed out that their main aim is to contribute to these underdeveloped countries' development. The construction of the infrastructure was a cover for that. Still, the real goal of constructing the infrastructure was to make it easier to transport exploited raw materials from third countries.
The correct answer for the question that is being presented above is this one: "For the first time, blue-collar workers were guaranteed an eight-hour day and a decent wage." The workforce change in the United States during the 1950s is that <span>For the first time, blue-collar workers were guaranteed an eight-hour day and a decent wage.</span>