Answer:
From an economic standpoint it was widespread inflation and food shortages in Russia that contributed to the revolution. The immediate cause of the February revolution was Russia's disastrous involvement in WW1 Russia stood no chance against industrialized Germany. Bloody Sunday in 1905 and the Russian defeat in the Russo-Japanese War both assisted into leading to the 1917 revolution
Seems the answer would be D.
Answer: the immediate aftermath of the battle was enough of a victory to give president Lincoln the confidence ti release the Emancipation Proclamation which declared an end to slavery in Confederate territory.