Which one of the following corporate board characteristics usually improves corporate governance?

a$.$ The board has a majority of insiders from company management on it who bring first$-$hand knowledge of how the company operates.

b$.$ The board is as large as is possible.

c$.$ Board members are paid at a rate higher than their peers and their payment is mostly cash.

d$.$ CEO is not the chairman of the board.

e$.$ The board has many outsiders who have lots of other important commitments.