The Marshall plan was a jolt bundle to kick off the war-desolated economies of Europe. By making monetary success, the nations of Europe would not be ousted by the communists. The offer was given to all nations including the Soviet Union. A prosperous Europe was the one thing Stalin did not need, and this was the start of the cool war and the iron window ornament.
Statistically speaking, larger countries experience more conflict, therefor I would say have to go with: A
If you plug in -2 then you can figure out by calculating