In developing countries, contaminated water is responsible for the deaths of more than 1.6 million people. Contributing to this problem is the use of

• A.  groundwater for consumption and the disposal of human sewage.
• B.  groundwater for consumption and the disposal of human sewage in surface waters.
• C.  surface waters for consumption and me disposal of human sewage.
• D.  surface waters for consumption and the disposal of human sewage in groundwater.