What is a social role? group’s expectations regarding what is appropriate and acceptable for the thoughts and behavior of its members group’s knowledge about the sequence of events in a specific setting person’s knowledge about the sequence of events in a specific setting socially defined pattern of behavior that is expected of a person in a given setting or group

socially defined pattern of behavior that is expected of a person in a given setting or group    

Explanation:

Social role: In social psychology, the term "social role" is described as a specific set of rights, beliefs, behaviors, norms, as they are being conceptualized by different people in a particular social situation. In other words, it states the behaviors, expectations, and responsibilities an individual ought of adopting in a few specific situations. However, an individual's normal or expected behavior is being reinforced by the individual itself and society.

answer would be b, a tariffs main purpose is to protect domestic production and jobs.