China’s special economic zones are territories that were established in order to . A. reduce industrial production
B. create farm communes
C. increase imports and exports
D. collectivize agriculture

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.