| Answer | % Correct |
|---|---|
| Mississippi River | 99%
|
| Missouri River | 96%
|
| Ohio River | 92%
|
| Colorado River | 91%
|
| Rio Grande | 90%
|
| Arkansas River | 82%
|
| Yukon River | 78%
|
| Columbia River | 76%
|
| Snake River | 68%
|
| Red River | 63%
|