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:
earlier i was concerned about your crucial expression
The correct answer is C. <span>the audience knows something the character or characters don't.
This is a fairly common element in plays and has been used as far back as ancient Greece.</span>
Answer:
It helps in building a better student-teacher rapport which we are in need of right now as we are gradually adapting to the new environment of learning we have due to the pandemic we are currently experiencing.