Final answer:
In the context of the mass media, nonpersonal communication from an identified sponsor is known as advertising. It is designed to reach a wide audience to promote products, services, or ideas through mass media channels.
Step-by-step explanation:
The form of nonpersonal communication from an identified sponsor using the mass media is c. Advertising. Advertising is distinct from other forms of communication because it is a paid form of communication whereby its content is controlled by the sponsor. It uses various mass media channels to reach a large audience to promote products, services, or ideas. The message is nonpersonal as it is not directed to individual consumers but rather to a wide audience and lacks personal interaction. Companies use advertising to inform, persuade, and remind consumers about their offerings.