D, checking the condition of the skin around the stomach
Answer: Marketing
Explanation:
To be more specific, the area would be marketing research. Marketing research is responsible for investigating the preferences that a consumer may have so that the product or service can be adapted to their needs.
When marketing research is done, the company makes sure to create something that can reach the widest possible audience and thus does not take the risk of making an investment in a product or service that people do not need.
Discharged in this sentence means to perform a throwing action over the heads of the people.
