Answer:
a) Appeal to the receiver's sense of responsibility and pride in the company's good name
Explanation:
Persuasive messages refer to communicating an idea so as to persuade the recipient towards an action.
Such messages are usually drafted by sales and marketing personnel.
While drafting a persuasive message, AIDA (Attention, interest, desire and action) principle is usually followed by the marketers.
In the given case, Mikhail's claim has already been denied once and he is drafting the second persuasive message. As he expects resistance from the media company, he should draw the attention of the recipient towards their own responsibilities and duties and pride relating to the good reputation of the company.
He may choose to express, what the receiver's responsibility and duties are and how non performance of those puts the company's reputation (pride) at stake.