Ace the LET Social Science Exam 2026 – Unleash Your Academic Superpowers!

River jurisdiction follows the geographic location of the river segments. When a river runs entirely within one state, that state has exclusive authority over it. When the river crosses into multiple states, each state governs the portion of the river that lies within its own borders, not the entire river as a whole. The statement that each state has jurisdiction over the entire portion of the river is not true because authority is divided by where the river actually flows, not by giving one state control over all parts of the river. The other statements align with this idea: a river confined to one state is under that state’s control, and a multi-state river is managed state-by-state for the segments within each state. Navigation and interstate considerations are handled through federal law and inter-state agreements, but the core point is that jurisdiction follows geographic segments rather than the river as a single unit.