I believe its B but i might be wrong IDK
Answer:
B- Gained wealth by buying, selling, and trading for goods in the triangle trade
Explanation
Although the United States was actively involved in World War I for only nineteen months, from April 1917 to November 1918, the mobilization of the economy was extraordinary. ... Over four millionAmericans served in the armed forces, and the U.S. economyturned out a vast supply of raw materials and munitions.
Answer:
because at there the british policy of appeasement had send there troops first so that enable hitler to send troops