Answer:
Letter c is correct. Public relations.
Step-by-step explanation:
A promotion mix is characterized as a set of promotional marketing actions that will help an organization achieve its goals. It consists of various marketing strategies such as advertising, sales promotion, public relations, direct marketing, digital marketing and others.
In this question, the most appropriate alternative is public relations, which is a variable in the promotion mix, which occurs when the communication and advertising of products and services are indirectly served by third parties. Generally the information is conveyed by paid or free advertising which consequently increases the interest, can also be realized through indirectly implemented announcements and news. This strategy can be used through magazines, newspapers, radio and tv shows and others.