The "aha! " moment demonstrated by wolfgang kohler's work with chimpanzees demonstrates:

Which answer best describes the u. s. national road? it ran from atlanta to baltimore and followed the railroad. it ran from new york to chicago and was made from wooden planks. it ran from massachusetts to ohio and ran parallel to the canal system. it ran from maryland to illinois and was made using macadam construction.

The expansion of the railroad networks led to

Which president was known for the statement “speak softy and carry a big stick? ”