Step-by-step explanation:
I don’t really know the exact answer to choose from the choices, but here’s some useful information that might help you:
While the rich focused on culture in Heian-kyo, events in the countryside began to weaken the Heian court. The practice of giving large estates to top nobles slowly eroded the emperors' power. The government could no longer collect enough taxes to support the emperor. Japan's rulers began to lose control.
Hope this helps! :)