What were some of the positive
perspectives of the immigrant?

answer:

Migration of skilled workers leads to a greater economic growth of the region. Children get better opportunities for higher education. The population density is reduced and the birth rate decreases.

Immigrants boost America's economic growth and raise the general productivity of American workers by providing much-needed skills. Immigrant workers allow important sectors of the economy to expand, attracting investment and creating employment opportunities for native-born Americans.

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option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation:

no one really purchased it themselves, it was all america, they had debates etc.