The two rivers that feed the Sacramento Delta are the ____ and the ____ rivers.

• A. Sacramento and American
• B. Sacramento and San Joaquin
• C. American and Feather
• D. San Joaquin and Yuba

Answer: (B)

Two large rivers shape the Sacramento–San Joaquin Delta: the Sacramento River and the San Joaquin River. These two rivers carry most of the freshwater that forms the delta as they flow from northern California, come together in the delta region, and then discharge toward Suisun Bay and San Francisco Bay. That direct pairing is why those two rivers are the ones feeding the delta. Other rivers, like the American, Feather, or Yuba, contribute water upstream to the broader Sacramento River system, but they are not the two main inflows that create the delta itself.