Where were nineteenth-century immigrants processed prior to entry into the united states? san francisco and philadelphia angel and ellis islands catalina and manhattan islands boston and new york

The correct answer is B) Angel and Ellis Islands.

The place where 19th. century immigrants were processed prior to entry into the United States were Angel Island and Ellis Island.  

The Chinese Exclusion Act of 1882 was federal legislation created to restrict and regulate immigration in the U.S., specifically for the Chinese immigrants that offered cheap labor. Ellis Island, next to the Statute of Liberty in New York, was the first federal immigration station in the U.S. It operated from 1892 to 1954.

On the West coast, the U.S. Immigration Station at Angel Island was the main U.S. federal immigration station. It operated from 1910 to 1940. It is located in the San Francisco Bay.