【单选题】

According to the first paragraph, what is the most possible and proper statement about the reason why change and stress are closely related
A．Change can be the motivation of stress and through their mutual interaction, there will be improvement.

B．Stress causes change to occur, and may bring negative effects such as the change of the job and the reduction of the salary.
C．Organizational change is a primary cause of stress and when change occurs, employees often experience role stress.
D．Change and stress are a pair of phenomena that will both appear in the process of employment.