Final answer:
OB/HR (Organizational Behavior/Human Resources) deals mainly with the people issues of a firm.
Therefore correct option is C.
Step-by-step explanation:
The subject that deals mainly with the people issues of a firm is OB/HR (Organizational Behavior/Human Resources). OB/HR focuses on understanding and managing the behavior of individuals and groups within organizations, addressing topics such as leadership, motivation, communication, teamwork, and organizational culture.
Learn more about OB/HR