Question

A noun clause is a subordinate clause that is used as a noun. A noun clause may be used as a subject, a direct object, an object of a preposition, or a predicate nominative. A noun clause usually begins with one of these words: how, that, what, whatever, when, where, which, whichever, who, whom, whoever, whose, why.
Which sentence contains a noun clause?
A) Whenever I feel cold, I feel miserable.
B) Whatever you want to do is fine with us.
C) The audience was restless until the performance began.
D) You will do well on the test as long as you answer the questions thoroughly.