The answer is: A. A narrative lead.
A narrative lead is the opening of the story, the phrases that hook the readers' attention and display the scene before they find out about the characters and the circumastances surrounding them. They can also be created through dialogue, action or imagery. A typical example of a narrative lead is the phrase "Once upon a time."
A is the correct answer to your question.
<span>You are allowed to add one more chapter.
I hope I helped!</span>
If the bolded word is <em>nobody, </em>then the correct answer is - this is an indefinite pronoun.
Since you don't really know who this nobody person specifically is, it is indefinite.