<span>A clause used as the subject of a verb is called an adverb clause. The correct option among all the options that are given in the question is the second option or option "B". The other choices can be easily negated. I hope that this is the answer that has actually come to your great help.</span>
No one was surprised when Frodo, my dog, started talking, as if everybody was expecting that to happen. John ran frantically from one block to another shouting.
