The Germans sank a British ship which had American passengers. This was the first step. After this due to the unrestricted submarine warfare more US ships were sunk by German U-boats.
"We the People of the United States, in Order to form a more perfect Union, establish Justice, insure domestic Tranquility, provide for the common defence, promote the general Welfare, and secure the Blessings of Liberty to ourselves and our Posterity, do ordain and establish this Constitution<span> for the United States of America.</span>
Fueling factories using something other than wood" since this greatly revolutionized production productivity.
The correct answer is A) It was a period of rapid economic and social transformation. Hope this helps.
