Answer:
a. Transported water from distant mountains to flood the area
Step-by-step explanation:
- Californian san Joaquin valley is a central valley of California that experiences a drought due to depletion of the groundwater and in 1920 it sunk up to 28 feet.
- As this region depends on large volumes of water this region is considered to be arid and semi-arid, the California state water project diverted surface water into the valley helped to prevent spring flood.