How can education promote the living standard of people explain

Explanation:

Education is the basis of economic development and societal advancement. Investment in education improves human capital, increases productivity and hence standard of living. ... On the aggregate level, education improves labour skills leading to increase in productivity and overall standard of living.

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 to ur question is college b