Early Human being when they accidently rubbed two stones together
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.
Of the candidates in the 1860 election, the only one who tried to run for a national campaign was Douglas
Because America had a connection with Cuba at the time
Answer:
there is no options to choose from
Explanation: