Immigration between 1870 and 1900 was on a drastic upswing because

A. Technology was developing rapidly

B. Factories were employing many people

C. Travel to and around America was improved

D. All of the above

Immigration between 1870 and 1900 was on a drastic upswing because travel to and around America was improved.

Explanation:

The immigration between 1870-1900 was in a great swing. The major reason behind this massive immigration was due to the improvement in transportation sector in and around America. Major transportation revolution took place in the sectors of railroads and steam ships. During those years most immigrants arrived from Europe and China. Historians referred them as either Push or Pull factors. People left their home land due to crop failure, land-job shortages, rising taxes and so on.