In the late 1800's, which of the following groups made up the
majority of factory workers?
A. men
B. women
C. children
D. skilled laborers

woman I'm pretty sure...

a. because the u.s. was the leading with the most technology, economy, etc. also was teamed with other allies witch boosted the economy and materials to improve technology and use it.

answer; /// i believe that the correct answer is (d)the huang he river valley;