The answer is B.
Hope this helped.
If the underlined phrase is <em>having been warned by her mother, </em>then this is a nonessential perfect participial phrase.
Nonessential phrases are separated from the rest of the sentence by commas, and since this is a perfect participle, this is the only correct option.
If you mean 'starting with five dollars' then it is a gerund phrase
The adaption they use is literary adaption in which the authors in which they adapt a literary source to another genre.
