Answer:
Letter C is correct. Influencer.
Step-by-step explanation:
A company's buying center involves all employees who are part of the organization's purchasing or service process.
Every company has a group of employees with specific knowledge to make buying decisions, including senior management, purchasing and finance teams, and technical staff.
In the case presented in the statement of the question, Selena is an influencer, who is the individual who has sufficient knowledge about a particular product or service so that their opinions are relevant to assessing whether the purchase will meet the needs of the organization.