What is federalism?
a. A system that makes the national government weak so that state governments can be strong
b. A system that gives the national government complete and absolute power
c. A system that divides power between the state and national governments

C

Explanation:

This kind of system divides the power equally due to the fact that laws can be set after each individual in each state. Rather than setting a law after a model where they assuem that it will fit everyone. For example, if there is a state that has it worse economically than others, than the leaders of that state can decide if its good to set a law that will only make their situation worse or if they should the people instead. Hope it helped!

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.        

answer; the intervening variable;