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.

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation:

b. florence

d. milan