Bob, a union worker, has been having trouble at work with his boss, whom he believes has been treating him unfairly. He decides to formally lodge a complaint against his boss with the union so that the union members can present his complaint to another management representative in the company. This is known as $\_\_\_\_\_.$

Question $9$ options:

a$)$

bullying

b$)$

negotiation

c$)$

a complaint

d$)$

a grievance