<span>Herbert Hoover earned the nickname “The Great Humanitarian" because he voluntarily did services in extensive flood work, especially when the Mississippi River overflows its banks in 1927 causing flood to neighboring areas.</span>
The answer is C, and the reason why is because the climate changed and since they where not used to that, that affected them, also rainfall and flooding started to shrink and that also contributed to the downfall of the Old Kingdom.
The PlanIT Valley Community requires 100 million high-tech sensors.
