What happens to a very massive star at the end of its life? * It explodes as a supernova
It diffuses and slowly creates a planetary nebula
It shrinks down and becomes a white dwarf
It splits in two

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.        

your answer is rising unemployment and inflation.

this is called police cynicism. i hope this .