Indicate which activities of Stockton Corporation violated the rights of a stockholder who owned one share of common stock.

a. Paid the stockholder a smaller dividend per share than another common stockholder.
b. Rejected the stockholder's request to be put in charge of its retail store.
c. Rejected the stockholder's sale of stock on an organized exchange.
d. Rejected the stockholder's request to vote via proxy because she was home sick.
e. In liquidation, paid the common shareholder after preferred stockholders were already paid.