Mary owns 500 shares of the Marina Corporation and her total basis in her shares is $50,000. Marina Corporation redeems 200 of Mary's shares. Assume the redemption is treated as a dividend for tax purposes. In this case Mary's basis in her remaining 300 shares after the redemption will be;

a. $30,000.b. $20,000.c. zero.d. $50,000.e. none of the above.