97 percent of the world's water supply is difficult, if not impossible, to obtain or to use
because it is in the oceans or in the form of glaciers and ice caps. Scientists are exploring
methods of conserving and protecting the rest of Earth's water supply for the growing
population. According to the information provided, which of the following activities most
directly affects the water supply?
A. flushing toilets and bathing
B. drinking and cooking
C. irrigating field crops
OD. producing energy and manufacturing
OE. growing all types of food