The cpn was headed by what chinese leader

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.        

they can increase to boost the enonomy.

it should be d or b but i'm sure it's d

answer; 35 year old african american man who is also a college graduate;