Which strategy is NOT likely to protect groundwater? 

A)  using advanced sewage treatment 
B)  monitoring aquifers near landfills and underground tanks 
C)  banning disposal of hazardous wastes in sanitary landfills and deep-injection wells 
D)  requiring liability insurance for old and new underground tanks

Advanced sewage treatment can help protect surface water, but it does not directly address the protection of groundwater. The other choices all involve measures that can help protect groundwater. Monitoring aquifers near landfills and underground tanks can help detect and prevent contamination, while banning disposal of hazardous wastes in sanitary landfills and deep-injection wells can prevent pollutants from being released into groundwater. Requiring liability insurance for old and new underground tanks can encourage proper maintenance and prevent leaks.