Which of the following conclusions is supported by the evidence in the chart?A. Irish immigrants were quickly able to climb the economic ladder of New York City and gain employment in middle-class professions.B. Irish immigration to New York City in the period before the Civil War did not significantly alter the economic structure of the city.C. Irish workers played a prominent role in the union movement in New York City in the 1850s.D. Irish immigrants comprised a majority of the workers in low-paying, unskilled occupations in New York City by the 1850s.

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