Ian O’Sullivan, CFA, is the owner and sole employee of two companies, a public relations firm and a financial research firm. The public relations firm entered into a contract with Mallory Enterprises to provide public relations services. According to the contract, O’Sullivan received 40 000 shares of Mallory stock in payment for his services. Over the next 10 days, the public relations firm issued several press releases that discussed Mallory’s excellent growth prospects. O’Sullivan, through his financial research firm, also published a research report recommending Mallory’s stock as a "buy". According to the Standards of Practice Handbook, O’Sullivan is required to disclose his ownership of Mallory’s stock in the:（）
A. press releases only.
B. research report only.
C. both the press releases and the research report.