<em>Answer: the Reader's Guide</em>
<em>Explanation: Hopefully this helps you (Pls don't report if this is wrong.)</em>
The noun clause is <span>how the Aztecs made their astronomical calculations.
</span>Just invert the whole sentence - The subject of my next paper is <span>how the Aztecs made their astronomical calculations.
</span>The whole clause is used as the direct object.
Udjsndkajagvdndkhxbsksidhdndkd
I say its C. correct me if I'm wrong
A is infinitive (to sneeze)
B is conditional (could change)
C is indicative (prefers)
D is imperative (cover)
