"Unsurpassed military power" ?

Hey @Danielle, Good question, answer choice A is a tricky one. However, specificity is not the problem here. The premise deals with the concept of military deterrence, which is one way to prevent an attack from an aggressor nation. The problem with answer choice A is the word "only." This implies that military deterrence is the ONLY way to prevent an attack. This is never stated in the premise. There could be diplomatic measures to prevent an attack, economic factors, etc. As for answer choice D, we do not need to infer "unsurpassed military power" from the premise. It is given to us in the answer choice. But what do we know about a country with unsurpassed military power? We know that it would definitely qualify for military deterrence against any nation, so long as they are aware its military strength. This is why D is correct.