Which of the following statements are true about citizenship in ancient Rome? A. most of those that became citizens were those that fought during the punic wars.
B. the emperor Augustus made everyone citizens in 63 C. E
C. julius ceaser prohibited citizenship to everyone who isn't a soldier
D. as soon as you paid your taxes you were granted citizenship.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

i got 3,4 and 5 as an answer

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