I'd have to say D is the correct one.
A central argument is a dominant and controlling argument.
The right answer for the question that is being asked and shown above is that: "An ideal nation is one that is not governed by a monarchy or dictatorship." the answer that best shows how this motto reflects transcendentalist principles is that a<span>n ideal nation is one that is not governed by a monarchy or dictatorship.</span>
The only preposition in the options available to you is of, so the correct answer is C.
A) and B) are conjunctions.
D) is an adverb.
