Answer:
B) friends
Step-by-step explanation:
Social environment can be described as the immediate physical and social surroundings where you live, or where incidents occur.
Examples of social environment are the culture of the where one lives which then imbibed, people like friends, siblings, etc. as well as intuitions that one interact with. The mode of this interaction could be face to face or via communication media.
Since friends are part of the people that one interact with, "friends" is therefore the correct option.