20.) Worker unions where created to combat worker exploitation?
True
False

True for sure.

I had learned this thing this year

Labour unions were created in order to help the workers with work-related difficulties such as low pay, unsafe or unsanitary working conditions, long hours of work, and other situations. Sometimes the unions organized strikes in order to try to change the conditions of the workers.

True

Explanation:

b) race riots in several cities

1) she is extremely upset