Sam Has Had Two Large Bottles of Water to Drink

Sam has had two large bottles of water to drink today, about 1,500mL of water in total. He is concerned that he hasn't consumed the recommended average amount of water intake for the day. He should reach the daily average as long as he

A) tries not to urinate that day.
B) eats food containing at least 750mL of water.
C) stays out of the sun and doesn't sweat at all.
D) drinks another 250mL of water.