How does the constitution provide both a stable structure for government and a flexible structure for making changes?

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In some african american communities, unemployment was as high as percent.

How did the construction of the erie canal improve transportation in the united states in the 1820s? a. the canal connected the great lakes to the mississippi river. b. the canal connected the great lakes to the ohio river. c. the canal connected the atlantic and pacific oceans. d. the canal connected the great lakes to the atlantic ocean.