Merging the roles of the chief executive officer and the chairperson of the board of an organization is advantageous because $\_\_\_\_\_.$choose an answer from below options

A$.$ the power of the stockholders and the independence of the board are increased

B$.$ the power vested in external public shareholders is decreased

C$.$ the checks that the board set in place against unethical behavior become more effective

D$.$ the board is led by someone familiar with the inner workings of the organization