Final answer:
d) Human Resources concerns employee-related issues, such as hiring, terminating, training, benefits, and labor relations.
Step-by-step explanation:
The subject of the question is Human Resources. Human Resources concerns employee-related issues, such as hiring, terminating, training, benefits, and labor relations. It specializes and focuses on the retention of employees and hiring practices to ensure the least number of firings and the greatest number of hirings relative to the organization's size.