On January 10, 2013, ZOE Corporation Declared a Cash Dividend

On January 10, 2013, ZOE Corporation declared a cash dividend when the related shares were selling for $10 per share.ZOE prepared the list of shareholders on February 10, 2013 at which time the shares were still selling for $10 per share.However, on February 11, 2013 the shares were selling for $8 per share.The dividend was paid on March 1, 2013 when the shares were selling for $9 per share.The ex-dividend date must have been:

A) March 1/13.
B) February 10/13.
C) February 11/13.
D) January 10/13.