Birds of passage were: a. immigrants who planned on returning to their homeland. b. single women who worked until they got married. c. strikebreakers who were sent in by factory owners. do. stowaways on passenger ships, attempting to immigrate to america. e. immigrants who visited settlement houses for temporary .

The correct answer is A.

The expression birds of passage was used to refer to temporary migrants, who moved to obtain those job positions which are considered of low-quality by native-born workers. The term was used at first in the 1840s, to refer to British inmigrants and continued to be used along the 20th century with the arrivals of European, Asian or Latin American migrants.

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.