The correct option is C (C) (D) (B) (A)
(i) Nicholas II :- Nicholas II was the last Emperor of Russia, ruling from 1 November 1894 until his forced abdication on 15 March 1917.
(ii) Imperialism :- Imperialism is an action that involves a country extending its power by the acquisition of territories. It may also include the exploitation of these territories, an action that is linked to colonialism.
(iii) Socialism :- Socialism is a range of economic and social system characterised by social ownership and democratic control of the means of producttion, as well as the political ideologies, theories and movements that aim to establish them.
(iv) Christoper Columbus :- Christoper Columbus was an Italian explorer, navigator. who discovered "New World" of America.