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.
I don’t honestly do not know the answer
<span>C. Provide training required by OSHA standards
One of the responsibilities that employers have, under OSHA, is to provide training to their employees. Everyone has the right to equal access to this training so that everyone is aware of their rights, the processes to follow in case something goes wrong, and the appropriate OSHA contacts/guidelines.</span>
The notion that one's misdeeds cannot go unnoticed
