Question

how did many us labor unions treat chinese immigrants in the 1800s?
labor unions did not allow chinese immigrants to become members.
labor unions helped chinese immigrants find jobs in mills and factories
labor unions asked companies to pay chinese immigrants low wages.
labor unions helped chinese immigrants form their own unions.

Explanation:

In the 1800s, many US labor unions were discriminatory towards Chinese immigrants. They feared Chinese immigrants would take jobs and drive down wages. So, they often excluded them from union membership.

Answer:

Labor unions did not allow Chinese immigrants to become members.