Answer:
This is an example of letter A. trait-anxiety.
Explanation:
Trait-anxiety is a stable tendency that is a part of one's personality. Trait-anxious people are frequently reporting feelings of worries, anxiety, and fears, even in situations that do not make others report such feelings.
According to the information given in the question, Kaito has never considered himself to be a people person. He is nervous about presenting his business propositions and about how to successfully communicate with his peers. This is a case of trait-anxiety, because his negative emotions come from a tendency he already has. It is not about this specific situation only, but about his not being a people person. Kaito certainly has repeated feelings of worries, fears, and anxiety that manifest in situations that wouldn't normally provoke them in other people. Kaito sees environmental stimuli - such as communicating - as threatening.
