Why Does a Company Require People to Act on Its

Why does a company require people to act on its behalf?

A) The Corporations Act requires a company to have at least one member
B) While the company is a separate legal entity and members generally enjoy limited liability, it is possible in certain circumstances to lift the corporate veil.
C) An unlimited company is a company whose members have no limit placed on their liability to the company.
D) A company is an artificial legal construct and relies on persons to make decisions and take action on those decisions.