Answer:
Subject
Explanation:
A noun clause is a group of words with a subject and a verb whose function is to acts as a noun in a sentence, thus, it can be a subject, a direct or indirect object, a predicate nominative, or an object of a preposition. We can identify them because they tend to begin with the words <em>how, that, what, whatever, when, where, whether, which, whichever, who, whoever, whom, whomever, </em>or<em> why. </em>
<u>In the sentence given, the noun clause “what she should do next” is acting as a subject because it is the thing being discussed and dealt with.</u>
