Why was the centrality of st. louis important to the settlement of the western part of the united states?

St. Augustine is the oldest permanent settlement in the united states

Explanation:

The answer is D) the location of three major rivers aided in transportation and settlement  

the period of human evolution has coincided with environmental change, including ('hominin' refers to any bipedal species closely related to humans – that is, on how do we know earth's climate has changed? a map showing dates and locations of prehistoric archeological sites and migration routes from africa into.

answer; allows decision to stand;