The correct answer is option 'D', the American Marketing Association (AMA). The AMA defines advertising as any paid form of non-personal presentation and promotion of ideas, goods, and services by an identified sponsor.

The American Marketing Association (AMA) is a professional association for marketers and marketing professionals in the United States. It is one of the largest marketing associations in the world, with over 30,000 members. The AMA provides resources, support, and education to marketers and helps to set industry standards.

Explanation:

1. Definition of advertising:
The AMA defines advertising as any paid form of non-personal presentation and promotion of ideas, goods, and services by an identified sponsor. This definition highlights the key elements of advertising, including payment for the promotion, non-personal presentation (as opposed to face-to-face communication), and the involvement of an identified sponsor.

2. Importance of identification of sponsor:
The identification of the sponsor is an important aspect of advertising. It helps consumers to understand who is behind the promotion and allows them to make informed decisions. It also helps to establish credibility and trust in the advertising message.

3. Non-personal presentation:
Advertising is a non-personal form of communication, meaning it is not delivered directly by a salesperson or through face-to-face interaction. Instead, it is typically delivered through mass media channels such as television, radio, print, or digital platforms. This allows advertisers to reach a large audience and deliver consistent messages.

4. Paid form of promotion:
Advertising involves payment by the sponsor to the media or advertising agency for the promotion. This distinguishes it from other forms of promotion, such as public relations or word-of-mouth marketing, which may not involve direct payment.

5. Role of the American Marketing Association (AMA):
The AMA plays a significant role in defining industry standards and best practices for marketers. By providing a clear definition of advertising, the AMA helps marketers and advertisers understand the boundaries and guidelines for their promotional activities. This definition also helps to establish consistency and clarity in the industry.

In conclusion, the American Marketing Association (AMA) defines advertising as any paid form of non-personal presentation and promotion of ideas, goods, and services by an identified sponsor. This definition helps to establish industry standards and guidelines for marketers and provides clarity on the nature and purpose of advertising.