If the geographical condition of an area is “water stressed,” what is a preferred public policy for that area?

A、Buildgoodroads,railtotheport;maintainrelationswithcoastalneighbors,etc.
B、Scaleuppublichealthinterventionstocontrolclimate-relateddiseases.
C、Examineanddevelopalternativeoptionsfordomesticenergysources,suchasgeothermal,hydro,windandsolarpower;emphasizeenergyefficiency.
D、Emphasizeirrigation,specializeincropsthatdonotrequirehugeamountsofwater.