Why in General Do Financial Managers Make Financial Decisions in a Corporation,rather

Why in general do financial managers make financial decisions in a corporation,rather than the owners making these decisions themselves?

A) It is best for the control of the finances of a corporation to be in the hands of a disinterested third party.
B) The interests of the various owners may conflict with each other.
C) The owners may not be Canadian citizens or residents.
D) There are often many owners,and they can often change as they buy and sell stock.
E) The owners will make decisions for their own self-interest rather than the corporation's interests.