This diploma______ that you have completed high school.

A．Corporate executives in general are worth the high pay they receive.
B．The income of corporate executives is proportional to the growth of corporate profits.
C．Corporate executives tend to take advantage of their position to enrich themselves.
D．The performance of corporate executives affects their own interests more than those of the shareholders.

A．diversify the business of the corporation
B．protect the interests of the shareholders
C．introduce effective reforms in business management
D．enhance the cooperation between the senior managers and the board directors