These are all describing the savannah river due to the fact that ithat river forms the border with South Carolina. Option B is correct.
The Savannah River constitutes a major river in the southeastern United States, which forms most of the border between the states of Georgia and South Carolina. The river is about 301 miles (484 km) long. The confluence of the Tugaloo River along with the Seneca River form the Savannah River.
