I believe this was influenced by the Britain's First prime minister.
The Battle of Stalingrad ended in a decisive Soviet Victory: the correct answer is B.
This battle lasted for over 5 months.
c: this option is not possible, as the Americans were not even a side in this battle. The other side was Germany, aided by their allies: Hungary, Italy, Romania and others
By process of elimination, I believe the answer to be B.
A is incorrect because they were fighting against the international brigade.
C is incorrect because Francisco Franco was the leader of the opposing side in the civil war.
D is incorrect because it was formed for the Spanish civil war and was disbanded after it.
The US gained possession of Guam, Cuba, Puerto Rico and the Phillipines.