Final answer:
(B) Neutralization is the display rule where an individual acts indifferent despite feeling emotion. Segregation is the intergroup relation with the least tolerance, and naturalism is the artistic style depicting characters under uncontrollable external influences.
Step-by-step explanation:
The display rule that involves acting as though you're indifferent or emotionless when you are actually experiencing an emotion is neutralization.
In psychological terms, neutralization is a display rule where an individual minimizes or inhibits the expression of their internal feelings to appear emotionless, often due to social or cultural expectations. For example, a professional poker player may use neutralization to keep a 'poker face' and not give away the quality of their hand to opponents.
Additionally, you asked about which intergroup relation displays the least tolerance. The answer to that is segregation, which is characterized by keeping groups apart and not allowing equal access or integration, thereby demonstrating minimal tolerance for inclusive intergroup relations.
Lastly, the artistic style that features impersonal depictions of characters compelled to behave in ways over which they have no control is known as naturalism. In literature and the arts, naturalistic works often portray individuals as subject to natural, social, or economic forces beyond their control.