Which of the Following Is True About "Supramajority" Requirements

Which of the following is true about "supramajority" requirements?

A) They can be required for voting, but not for quorums.
B) They can be required for either voting or for quorums, but such requirements must have been included in the original articles of incorporation.
C) They are automatically required for quorums of shareholders meetings, and voting at such meetings, when approving mergers, consolidations, or the sale of substantially all of the assets of the corporation.
D) They can be required for either voting or for quorums, and if the requirement is added in an amendment to the articles of incorporation or corporate bylaws, the vote approving the amendment must pass by the same supramajority as the new supramajority requirements contained in the amendment being voted on.
E) They can be required for either voting or for quorums, and if the requirement is added in an amendment, a simple majority vote approving the amendment is all that is required for the amendment to become effective.