The four types of promotion that are commonly used are personal selling, sales promotion, advertising, and relations. о O a) Private b) Vendor c) Customer d) Public O

Public relations ...PR

Explanation:

Public relations refers to the company's efforts to establish and maintain good and mutually beneficial relationships between itself and the public. It is the process of creating a good reputation for a business in society.

A good reputation is a great asset that helps a business drive its sales. With increased competition, reputation makes a brand stand out from its rivals. Public relations is the process of managing

reputation by interacting and building good relationships with all the company's stakeholders.

answer; no individual buyer or seller has any significant impact on the market price;

answer the law of increasing costs;