How do i get a i have tried almost everything

How did presidential reconstruction allow black codes to be passed

Aryans believed that the most important thing in life was warfare. if this statement is true, which of the following facts best supports it?

Using mr smith and his id, identify two potential internal validity threats that might affect the a—b design. tell me how that threat might impact conclusions in the a—b design. note #1: you cannot use maturation (since i already did that one for note #2: there are some mr smith id threats that won’t have much impact in a single case design.