I would say C aids, hope this helps
Answer: material culture
Explanation:
A sociologist who studies the use of architectural elements, building materials, paint, and lighting in a historic district is said to be studying material culture.
Material culture refers to the aspect of social reality which had to do with the objects and the architecture by which humans are surrounded. It has to do with the usage, creation, trading of objects.
Trade expands knowledge because you are going to know more of something that is not only coming from you. When you do the trading, you are exchanging you goods or services with another goods and services coming from different people or country.
I think the correct answer would be the first option. Focusing on information that concerns your audience the most will increase the chances of effective messages. Most likely, the audience would have interest on what your message is all about and they would have better perception since it concerns them.