In which area has China experienced the most success in reforming since the death of Mao Zedong? A)
democratic reform
B)
human rights violations
freedom of speech and press
D)
economic growth and private ownership

It is D) EconomicGrowth And private ownership.

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Explanation:

The league of nations was found in 1919 to keep peace after world war l.but it failed to prevent world war ll in 1939,so in 1945 the nations of the world set up a new organization,the united state (un).since then, the un has encouraged international cooperation and worked to resolve conflict