How much water would you allow per persons as officer in charge of the lifeboat, following an abandon ship operation ?

A. Nothing for the first 24 hours, then ¼ litres per day
B. ½ litres immediately followed by ¼ litres per day
C. Nothing for the first 48 hours, then ¼ litres per day
D. Nothing for the first 24 hours, then ½ litres per day