What was the main reason that slave codes were created? to keep African Americans powerless and under control

to address criticisms of the system of slavery

to ensure reasonable treatment of enslaved people

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.