Final answer:
The water demand per capita for residential areas in the U.S. is approximately 100 gallons per day, which is not listed among the provided options A, B, C, or D.
Step-by-step explanation:
The water demand per capita in the United States for residential areas is quite high. A typical person in a U.S. household uses about 100 gallons of water per day. This includes water used for cooking, washing dishes and clothes, flushing the toilet, and bathing. When considering outdoor residential water use, which comprises landscape irrigation, filling and backwashing swimming pools, washing pavement and cars, and other uses, the average outdoor use in the sampled North American cities was 138 gallons per household per day (524 liters per day).
Considering these figures, the answer to the student's question would be: The water demand per capita in the United States for RESIDENTIAL areas is approximately 100 gallons per day. Therefore, the correct answer would be none of the options provided.