HELP MEH 20 POINTA What would be the best title for the list above?

A-Causes of the Mexican-American War

B-Reasons for Population Growth in Texas

C-Arguments for Texas Maintaining its Independence

D-Examples of achieving Manifest Destiny

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.