Final answer:
Kent is using the influence tactic known as ingratiation to build a personal following and gain loyalty from others. Therefore, the correct option is D.
Step-by-step explanation:
Kent is using the influence tactic known as ingratiation. Ingratiation is a social influence strategy where an individual attempts to gain someone's favor or approval by being kind, helpful, and friendly. Kent is building a personal following by promising future benefits to those who are loyal to him, which is a form of ingratiation.