Probably the Most Significant Explanation for the Fall of the Qin

Probably the most significant explanation for the fall of the Qin dynasty is that the

A) army turned against the attempt of the emperor's wife to seize power.
B) factionalism and resentment created by Qin Shi Huangdi's policies created internal weaknesses that undermined the dynasty's survival after his death.
C) eunuch system created a new base that resulted in an internal seizure of power.
D) humanitarian nature of Qin Shi Huangdi's policies produced a vulnerable and weakened empire.
E) Yellow River flooded all of South China.