Which of the Following Statements Is TRUE Regarding the Disposal

Which of the following statements is TRUE regarding the disposal of shares by a shareholder?

A) When a shareholder sells shares to other shareholders, the corporation's capital base increases.
B) The sale of shares to other shareholders is known as a 'buy-back'.
C) The sale of shares back to the corporate treasury is not an allowable transaction.
D) The sale of shares to the corporate treasury may result in a deemed dividend and a capital gain or loss to the shareholder.