What Led to the Overthrow of Sui Y Angdi and the Collapse

Multiple Choice

What led to the overthrow of Sui Y angdi and the collapse of the Sui Dynasty?

A) He lost the Mandate of Heaven through his licentious ways.
B) He was overthrown by the outlying aristocracy.
C) His wife's family deposed him for choosing a different some as his successor.
D) He lost a campaign in Korea and was murdered in his palace.
E) He had a religious epiphany and retired to a Buddhist sangha .