Answer D Misleading

My question is in regard to the answer D which is correct, but I found it misleading and for that reason, I eliminated it off the bat. Answer D says: "It is in the interests of a nation that seeks deterrence and has unsurpassed military power to let potential aggressors against it become aware of its power of retaliatory attack." The issue as I see it, is the "unsurpassed military power" portion of the answer. A country does not have to have unsurpassed military power to seek or have deterrence. A country can be tiny and weak compared to many other countries, and be eyed for an attack by an even weaker enemy who will then be deterred for fear of retaliation. I believe that the "unsurpassed military power" is a conjecture easily done by a person from a country as big and powerful as the U.S. I eliminated D immediately because of this. Kindly, please let me know your thoughts and possible explanation in regard to this. Thank you.