The correct answer is C. Staffing.

Staffing is the process of finding, hiring, and training the right people for the job. It involves identifying the skills and qualifications needed for the position, recruiting qualified candidates, and selecting the best person for the job. Once a person is hired, staffing also includes providing them with the training and development they need to be successful in their role.

Planning is the process of setting goals and objectives, and developing strategies to achieve them. It involves identifying the current situation, analyzing the environment, and developing a plan of action.

Organizing is the process of creating a structure for the organization, and assigning tasks and responsibilities to employees. It involves designing the organization's hierarchy, developing policies and procedures, and allocating resources.

Directing is the process of motivating and guiding employees to achieve the organization's goals. It involves setting performance standards, providing feedback, and resolving conflicts.

In conclusion, staffing is the managerial function that deals with placing the right people at the right places. It is a critical function that ensures that the organization has the right people with the right skills to achieve its goals.