Publicity is part of a company's product mix promotion mix sales promotion advertising mix

The correct answer is: "promotion mix"

The promotion mix is one of the four components of the so-called 4 p's of the marketing mix: price, promotion, placement and product. This mix comprises all the marketing tools and strategies employed by a company in order to create, maintain and boost the demand for its products.

The promotion mix creates awareness and secondly it aims to persuade potential customers of making the purchase. It comprises the following activities: publicitiy, advertising, sales promotion, personal selling, public relation and direct marketing techniques.

b. sec, foreign relations

i would say b. or c.