In general, it is true that Mao was a visionary who slowly lost touch with reality as time went on. He mostly failed in many ways because he tried to push for reforms that his people were not ready for.
I would say b. the union
hope it helps :)
the answer is gross national income
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Triple entente
1. France
2. Russia
3. Great Britain
Triple alliance
1. Germany
2. Austria-Hungary
3. Italy