Answer D is false. The germans used a ton of airplanes for their Blitzkrieg tactic. Allied bombers hurt the german economy, crippling their war macine. And most of the pacific victories of the US against Japan, such as the sinking of the yamato, was mostly because of the air force the US possesed.
To get resources such as water,food,and transportation
In the light of your question I think it was a Russian success and the US is yet to achieve such achievements. During that time when the Cold War is in the climax between the two superpowers both competed not only in arms race but technological advances trying to outwit each other. The Russians gain the upper hand because they were able to make the things stated above before the United States but in the end the US was able to make also such things in their own ways and successfully outwitting the USSR in economy and world power.