c. guilty
(you really should just read the story its interesting and doesnt take long )
An adverb clause is a subtype of subordinate/dependent clauses, meaning that it cannot exist on its own, outside of the main, independent clause. In these examples, there are several dependent clauses, in A, C, and D, however, only in C there is an adverb clause 'when we go to the store'.
In the other examples, there are only adjective clauses.
So, the correct answer is C.
The witches are the ones who give Macbeth the prophecy that he will one day become king, that Banquo with father kings, and that Macbeth can not be killed by anyone born of woman. These set off Macbeth's entire journey in the play and motivate him to kill the king, kill Banquo, and ultimately lead to his downfall.
