Subject to a provision in its articles, a corporation may create and issue, whether or not in connection with the issuance and sale of any of its shares or other securities, rights or options entitling the holders of the rights or options to purchase from the corporation shares of any class or classes. These rights or options shall be evidenced in the manner the board approves and, subject to the provisions of the articles, must set out the terms upon which, the time within which, and the price at which the shares may be purchased from the corporation upon the exercise of the right or option. If the rights or options are to be issued to directors, officers, or employees of the corporation or of a subsidiary of the corporation and not to the shareholders generally, their issuance shall be authorized by the approval of the outstanding shares or must be consistent with a plan so approved or ratified. In the absence of fraud in the transaction, the judgment of the board as to the adequacy of the consideration received for the rights or options is conclusive.