Which type of leadership is critically important in a company with a large number of newly hired employees who are not accustomed to their roles and responsibilities?

 Theory X        

Explanation: In simple words, theory X refers to the management style in which  the manager assumes that his or her subordinates are inefficient and irresponsible workers who need strict disciplinary monitoring.

In such a management style, the managers oversee every step that their subordinates takes and do not give them authority to make decisions. Promotion and other such kinds of appraisals are completely dependent on tangible results.

This kind of management and leaderships style is usually used for employees who have less work experience and needs strict management guidance.