Final answer:
The 'close talker' from Seinfeld demonstrates kinesics, which is the study of body language and nonverbal communication cues.
Step-by-step explanation:
The 'close talker' video clip from the Seinfeld episode is an example of B. Kinesics. Kinesics refers to the interpretation of body language, facial expressions, and gestures within communication. In the clip, the character's lack of personal space when conversing exemplifies nonverbal communication cues that are central to kinesics. It's not related to the linguistic elements of code-switching or sociolinguistics. Code-switching involves shifting between different linguistic styles or languages in conversation, which is not the case here.