The continental divide of North America separates rivers that drain into the Pacific Ocean from those that drain into the Atlantic Ocean, running through the Rocky Mountains.
The continental divide of North America is a geographical ridge that broadly separates the watersheds that drain into the Pacific Ocean from those river systems which drain into the Atlantic Ocean. Specifically, the continental divide separates rivers that drain into the Atlantic from those that drain into the Pacific Ocean. This divide runs through the Rocky Mountains and extends from northwestern Canada, through the United States, and into Mexico. Rivers to the east of the divide, like the Mississippi River, flow toward the Atlantic Ocean, while rivers on the western side, such as the Colorado River, flow toward the Pacific Ocean.
In conclusion, the correct option that describes what the so-called continental divide of North America separates is: d) rivers that drain into the Atlantic from those that drain into the Pacific.