A. I ate a slice of bread last night.
B. Sita lost her earring in the park
C. I sold my watch to him last month
Within a group, your role is defined as the way you communicate with others in your group.
The way a person behaves, the position, the way the person interacts with the rest of the members of the group determines the role that this person would perform. Leadership, expectations from the other members of the group, assignment etc.
C) The tension a character feels between two cultures is an example of internal conflict.