C.<span>Chen answered the questions most eagerly of all.</span><span> The others are wrong because: 1) "most" is a superlative word and so is "slowest" so they shouldn't use them together. 3)"more" is a comparative word and so is "later" so they shouldn't be used together. 4) "more" and "bigger" are both comparative so they shouldn't be used together too. The point is: two comparative or superlative words shouldn't be used together.</span>Eagerly is not a comparative or superlative word so it can be used with "most"<span>
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That it is a good circus and it was well known at the time.
The correct answer of the given question above would be the second option. A noun clause is a dependent clause that functions as a noun and is usually introduced by the words that, how, whatever, what, when, where, whether, which, whichever, who, whoever, whom, whomever and why. Therefore, the answer that identifies the noun clause is this: <span>How the Aztecs made their astronomical calculations. </span>