Select the correct answer.
the graph shows that groundwater levels in cook county, georgia, have been receding since the 1960s. what is one likely cause?
no
usgs well 18h016. cook county, georgia
water level below land surface (feet)
1967
1974
1981
year
1988
1995
2002
a an increase in the amount of rainfall
b. an increase in demand for groundwater
c a decrease in demand for freshwater
d. a decrease in agriculture and irrigation