Out of the six points in Source D, 3 and 5 pertain to Germany's "war aim."
1 refers to its personal vengeance against France.
2 and 4 refer to its economy and industry.
6 refers to its stability and in some parts its personal motives against Russia.
5 refers to "militarily important ports," which will definitely improve Germany's war effort.
3 refers to France's "war indemnity," which would prevent it from creating armaments "in the next 15-20 years," a factor that would greatly bolster Germany's chances for success.