Which is one reason that factory work was dangerous in the 1800s?
a)machines were too difficult for workers to use.
b)there were not enough workers to operate large machines.
c)most machines had few safety features.
d)there were not enough machines to meet demand for products.

Which statement best describes standard oil in the late 1800s? standard oil controlled only a small number of the nation’s oil refineries. standard oil was a single business that operated in a small region. standard oil controlled only the means and methods of oil production. standard oil owned ninety percent of all oil refineries in the united states.