Answer:
A.) February 21st
For the first quarter, this date is the date of declaration. In earlier years, this same dividend is what is paid. The price of the stock would not be affected too much by this.
B. March 13th
This is a date for ex dividend. The price in the stock market could fall by the same amount of the dividend.
C. March 15th
This date is the record date. The price cannot be influenced given that any stock that is traded in public is usually affected by the date of the ex dividend.
D. March 30tg
This date is the payment date. Liability is paid only as dividends payable.