According to the Findings of Researchers in the Field,which of the Following

According to the findings of researchers in the field,which of the following is most likely to be an effective Board of Directors?

A) A small board with a large proportion of directors who are not employed by the company or other companies with which it does business.
B) A small board with a large proportion of directors who are employed by the company or another company that has a business relationship with the company.
C) A large board on which most directors have served a long time.
D) A large board on which most directors are employees.