Why did white workers resent black workers?

Which events are correlated but do not necessarily have a causal relationship?

Who believed that the best economic system was on in which businesses compete to gain profit with minimal or no government control

What role did mazzini play in italian unification? a.) he dreamed of a united italy and took the first steps to achieving it. b.) he conquered the southern part of italy, including sicily. c.) he was the first leader of a united italy. d.) he was assassinated by the french government, making him a martyr.