How far back in history do written sources go?

How did the mountains on the oregon trail influence the timing of pioneers’ travels? a.) the pioneers wanted to avoid times when there was snow in the mountains. the pioneers wanted to spend as much time as possible enjoying the mountain scenery. b.) the pioneers crossed the mountains in late fall when the trees were bare and the views were good. c.) the pioneers were rugged people who were not impacted by the terrain they crossed at any time.

The structure of the federal bureaucracy is well-known as being large and complex. which of the following is not part of the federal bureaucracy?

Population parameters are difficult to calculate due to