I need help……
Please

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.        

protectionism fosters competition and keeps price regulated is not an argument in favor of protectionism.

answer; limbic system;

answer; empathy;