What organizational function is responsible for managing a firm's communications and public image?

The correct choice is public relations (PR) because this function specifically focuses on managing a company's communications with the public and shaping its public image. PR encompasses a range of activities aimed at building and maintaining a positive perception of the organization among its various stakeholders, including customers, employees, investors, and the media. This includes crafting press releases, managing media relations, and overseeing crisis communication, all of which are essential components of how a company communicates with the outside world and monitors its reputation.

While the marketing department primarily focuses on strategies related to sales, promotions, and market research, it does not exclusively handle the broader aspects of public perception and media relations. Similarly, the advertising division is more concerned with creating and placing promotional content designed to drive sales rather than managing relationships and communications that foster an overall positive image. Corporate communications may encompass aspects of PR and marketing, but it often focuses on internal communications and messaging rather than external public relations tasks. Therefore, public relations is the most appropriate choice for the responsibility of managing a firm's communications and public image.