Sam Adams, John Adams, Paul Revere, George III of the United Kingdom, Thomas Hutchinson, Fredrick North (Lord North), George Robert (Twelves Hewes)
Steel. Andrew Carnegie used it to mass produce steel cheaply and efficiency.
The answer is D
Reason being that the sinking of ships by German U-boats, and a German attempt in the Zimmermann Note to get Mexico to declare war on the U.S. pushed the U.S. to getting involved.
