Mr. Seider, a shareholder in the Greenfield Corporation, owns 9,000 shares of their common stock, which represents 20% of the outstanding common stock of Greenfield Corporation. Mr. Seider receives a 5% stock dividend. After the stock dividend, what is Mr. Seider's ownership in Greenfield Corporation's common stock?

A 15% ownership

B 5% ownership

C 20% ownership

D 25% ownership