The United States tried very hard not to be involved in the war. At first all they did was help out their allies with food and other supplies. They didn't actively join the war until December 7, 1941 when Japan bombed pearl harbor. They officially declared war against Japan and soon after Germany.
I think it's D. Hindu- Arabic Numerals
C) She over saw the conquest of Korea.
The Mongol expansion of the Asian continent during the period from 1215 to 1360 helped to stabilize the political process and redefined the Silk Road through Garkurm. The thirteenth century witnessed a Mongol-Afrangian alliance with an exchange of embassies and military cooperation with Cham and Palestine. Most of the European royal plaques between 1287-1288, as well as travelers Marco Polo and Monsieur William Rubrec, few European travelers traveled the entire Silk Road. Instead of traveling the goods were transported from one hand to another as a long chain from China to the West and the result is the high prices of goods that reach Europe.