The general recommendation for daily water intake varies, but a common guideline is to aim for about half an ounce to an ounce of water for each pound of body weight. For a person weighing 150 pounds, this would translate to approximately 75 to 150 ounces of water per day, or about 9 to 18 cups.
However, for a typical recommendation, many health guidelines suggest about 8 cups (64 ounces) of water per day as a general target.
Given your options, 8 cups is the most reasonable choice, though individual needs can vary based on factors like activity level, climate, and overall health.