| Answer | % Correct |
|---|---|
| Mississippi River | 99%
|
| Missouri River | 95%
|
| Colorado River | 92%
|
| Rio Grande | 89%
|
| Ohio River | 83%
|
| Arkansas River | 71%
|
| Yukon River | 69%
|
| Columbia River | 61%
|
| Snake River | 58%
|
| Red River | 55%
|