Oskar Groening, at 94, is one of a shrinking pool of former Nazi leaders
D would be the best answer. The larger hammer would have a greater mass indeed. So it would creat more friction between the nail and the hammer creating more force being applied to the nail. Therefore the nail being able to go into the wood.
I believe it was by giving support to the European countries economically and politically.
Number one: You're answer is D. The government controlled everything, due to it being Communist.
Number two: The answer is C. When oil lost it's price dramatically, the USSR's economy fell and it could no longer control the Middle East as well as before
Number Three: The answer is A. Socialist republic Russia today isn't officially a communist country. But there are many communist factors, and traits that it is using right now.