Why Did the Progressive Land Reform Policies of the Northern

Why did the progressive land reform policies of the Northern Wei dynasty fail to bridge the cultural divide between the Han and the Tuoba?

A) The Han were insulted that the Tuoba wanted to redistribute their land.
B) The Han nobility had all fled south, and Han peasants refused to work for the Tuoba.
C) The Tuoba had little interest in farming, so were not interested in working with the Han.
D) Empress Fang had overreached her powers as regent, raising strong opposition to the Northern Wei dynasty.