B. Fake sciences claimed that whites were smarter and more capable than other races.
Explanation:
This nativist were certain American natives who come together to form a group so as to protect and defend the interest of the original inhabitant against the influx of immigrants into American soil. Some of their reasons or fears over the new immigrant include:
Nativists have the belief that the incoming migrants will take away some of their jobs.
That immigrant might damage the existing culture of the nativist.
Shortage in housing and other facilities.
Fear proclaim by scientists that whites were more smarter and capable than any other race.
The railroad became a way for companies to ship to each other from across the country, transport raw materials to factories, and send final products to consumers.
