Cedar Key Florida, the freshwater aquifer used for the city water supply is continuous with the seawater surrounding the island. In which of the following situations is saltwater intrusion most likely to occur?
a. reduced use of city water through conservation efforts and unusually high rainfall throughout the year
b. increased use of city water and unusually high rainfall throughout the year
c. reduced use of city water through conservation efforts and unusually low rainfall throughout the year
d. increased use of city water and unusually low rainfall throughout the year