I think their relationship wasn't really in friendly terms. I think their relationship is fueled by the idea of defeating Germany and Japan. Both leaders were good military strategists, they work on synchrony on how they can defeat their enemies. Roosevelt was the first to approach Churchill and was able to get him to supply the US with arms and a naval fleet in order to defeat Japan and Germany
Those people believed in the Mandate of Heaven, they thought that God selected the legitimate ruler. So, the Zhou claimed that the Shang were not chosen by God, and therefore, be overthrow-ed, the answer would be 1
