elena is the director of human resources for a small manufacturing firm. She has a strong personal interest in technology, and is known throughout the firm as the one with the most knowledge about new kinds of communications technologies. If the firm decides to upgrade its network, Selena will probably function in what role in the firm's buying center?

Influencer

Explanation:

Influencer -

It refers to a person who is capable to influence or hold to a particular target audience, is referred to as an influencer.

The method is employed in the market, in order to promote any goods or services, so that more people get to know about it, and tries to purchase the product, which will increase the sale of the product and hence will increase the profit of the company.

Hence, from the given scenario of the question,

The correct answer is influencer.