PLZ HELP ME!!

Why was the oral tradition important in Africa?

A. It was a ritual believed to bring rainfall.
B. It was used to communicate with the king.
C. It helped pass traditions to younger generations.
D. It helped ensure the success of the gold-salt trade.
E. It helped develop communication between tribes.

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.