B. A supporting detail from common knowledge
I did not touch a hair on his head.
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.
Answer:
The first option
Explanation:
I just took the test and got 100%
