Among the options given on the questions the answer is option B.
The Russian revolution.
Explanation: The Tsar's refusal to share power and the Russian nobility's resistance to social change in the early 1900s eventually led to the Russian revolution.
Tsar Nicholas II was not able to rule effectively. He made some wrong decisions which made the relation poor with government and made worsen the situation of the civilian.
Moreover he was not willing to share power with the government.He wanted the absolute power of the King.
Moreover the Russian nobility resistance to social change in the early 1900s is also a cause which led to the Russian Revolution. They were against the socialist parties and any kind of social reform.
When it comes to number of inhabitants, Asia ranks first by far. In mid-2016, there were over 4.5 billion people living on the continent alone, more than half of the world's population.
