Access to potable water is most heavily limited by

a. money
b. precipitation
c. raw water supplies
d. climate

I think the answer is raw water supplies becaus it could be limited by the fact that there may be sewage in the water

Potable water can be sourced out from the nearest aquifer or water source available such as spring or any fresh source of water that can be converted to its potable equivalent through series of chemical processes. Hence the answer to this problem is C. raw water supplies