Which one of the following groups of people did not contribute to the american cause in the revolutionary war?
a. french
b. native americans
c. women
d. italians

It would be "d. Italians" who did not contribute to the American cause in the Revolutionary War, since they had no strong physical holdings in there area and therefore had no economic incentive. 

Ifound this on google “simply, the working conditions were terrible during the industrial revolution. as factories were being built, businesses were in need of workers. with a long line of people willing to work, employers could set wages as low as they wanted because people were willing to do work as long as they got paid.” i hope this you for what your looking for.