The best choice that supports the geographers’ and hydrologists’ argument is:
(Choice A) Canada and Australia have similar precipitation levels but very different amounts of freshwater resources per capita.
This choice illustrates how two countries with comparable precipitation levels (537 mm for Canada and 534 mm for Australia) can have vastly different amounts of renewable internal freshwater resources per capita (75,795 m³ for Canada versus 19,416 m³ for Australia), thereby highlighting the influence of factors beyond precipitation on freshwater availability.