Mad Ltd has Class A shares and Class B shares.Class A shares are entitled to one vote per share. Class B shares are entitled to two votes per share.Article 8 of the constitution of Mad, Ltd provides: "Any rights associated with Class B shares issued by Mad, Ltd can only be varied or cancelled by a special resolution of the company." The directors of Mad, Ltd want to reduce the Class B vote to one vote per share.Pursuant to section 246B of the Corporations Act, in order for these rights to be varied as proposed:

a. The company needs to pass a special resolution.

b. A special resolution needs to be passed at a meeting of the Class B shareholders.

c. Class B shareholders with at least 75% of the votes in the class need to provide written consent.

d. A, B and C are all required.

e. A,and either B or C are required.