Throughout their military history, russians have used to their advantage.
a. the weather
b. mountains
c. rivers
d. siberia

  A. The weather.

Explanation:

  Russia had two greatest invasions, the French under Napoleon´s command and the German under Hitler´s orders.

  Both invasions gained several portions of the Russian soil but failed to convince the Russians of surrender against them. Both invasions were planned to be fast with a large number of troops but they never counted on the strength and resistance of the Russian army. The attacks took larger than expected and when the winter arrived both armies suffered the cold and ended withdrawing their forces.

  I hope this answer helps you.

this article will :

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.