Answer:
Letter a is correct. Not only demographic information, but also psychographic information and any other information that will help the creative.
Step-by-step explanation:
One of the most important steps in the design of a project is the briefing, which can be defined as a set of relevant information that will assist in the development of a work.
Therefore, in the question above, the most appropriate option would be the letter a, because in the preparation of a creative brief it is relevant that the information collected is more than just demographic information, in the case of psychographic information, it can help the understanding of more in-depth characteristics about a group of consumers and provide a more complete analysis to reach the expectations of the potential audience