7.What was beneficial about the Mountains in Northern India? (1 Point)
A. they provided shade for most of the subcontinent
B. they are places where people settled and farmed
C. they are easily passable for trade
D. They provided protection against foreign armies

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.