Anxiety and change in cognition of an individual behaviour is mainly relies upon both genetic traits & environmental predisposing stress- factors.
The exercise program is the major aspect of physiological coping strategy to cope with high stress. Majority of people, who are approximately 50% are under exercise program for upto 6 months to cope with high work stress. The psychological coping methods are useful with one or all of these stressors by investing own conscious effort finally to resolve the "main causes that are responsible for the personal or work problems". These coping methods are such as "positive reinforce methods" & nutrition, exercise and adequate sleep enable to reduce or tolerate any stress caused by the above causes.
Thus, the options (b), (c) and (a) are incorrect.
Majority of people, who are approximately 50% are under exercise program for upto 6 months to cope with high work stress.
Therefore, the correct option is – d). 50%.