Answer:
d. the company a person works for.
Explanation:
In contemporary Japanese society, a group is associated with the company a person works for.
A group typically comprises of two or more people who share some things in common such as identity, aims, interest and are willing to work in an accord.
Hence, the company or organization an individual works for, is usually considered to be a group in the contemporary Japanese society.
This is so because employees are blinded by a common goal, aim, interest to allow them work effortlessly, effectively and efficiently together.