The correct options are: B -C
• The beginning of the war for the United States clearly reflected the strategic priorities of this country. As for Europe, the United States through 1942 limited itself to ensuring that Britain was not invaded, maintained the flow of armaments for both the British and the Soviets, and set about gaining control of the Atlantic sea lanes. Using the United Kingdom as an air base, the US Air Force began a strong offensive on the industrial, transport and population centers of Germany. Only at the end of 1942 the North American troops invaded the North of Africa and in July of 1943 the south of Italy. It was only in June 1944, with the invasion of Normandy, that the United States launched fully into the war in Europe.
• The Battle of Stalingrad was a warlike confrontation between the Red Army of the Soviet Union and the Wehrmacht of Nazi Germany and its Axis allies for the control of the Soviet city of Stalingrad, current Volgograd, between August 23, 1942 and February 2, 1943. The battle took place in the course of the German invasion of the Soviet Union, in the framework of the Second World War. With estimated casualties in more than two million people between soldiers of both sides and Soviet civilians, the battle of Stalingrad is considered the bloodiest battle in the history of mankind. The serious defeat of Nazi Germany and its allies in this city meant a key and severe turning point in the final results of the war and represents the beginning of the end of Nazism in Europe, because the Wehrmacht would never recover its previous strength nor would it obtain more strategic victories on the Eastern Front.