Taira no Masakado was widely revered as a just man and came from a big family so he was a candidate well suited for position.
Explanation:
Masakado was born into an influential family and had grown up to be the leader of the legions of Samurai and a powerful landowner. His influence made him one of the most powerful and well revered men in the country.
He led the rebellion and was able to sustain it for a long time as his people were fiercely loyal to him to the end. When he was beginning his revolt, a vast swarm of butterflies came to Kyoto and surrounded him, as if to show that he will be victorious in the upcoming battle.
Answer: The emperor did many things to unite China. Including building The Great Wall, standardizing currency and weight measures and building roads from and to many places inside the country. That being acknowledged, there are only two answers that represent those deeds.
