The existence of God
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The seminal philosophy seeks to describe the relationship between God and man and to
explain how man's reconciliation with the Divine is made possible at all
through Christ. To do this, Aquinas must prove the existence of God, and postulate an answer.</span>
The Islamic calendar employs the Hijri era whose epoch was retrospectively established as the Islamic New year of AD 622. During that year, Muhammad and his followers migrated from Mecca to Yathrib (now Medina) and established the first Muslim community (ummah), an event commemorated as the Hijra.
Your answer is D I'm for sure.
The reasons for the revolutions are many, but we can point out some as the form of government; Russia was one of the last major European countries where the monarchy was an autocrat, his power not limited by laws or institutions. Another fact was the total inefficient emperor and Tsar of all Russians, Nicholas II.
Also, the development of an "educated middle class", result of the industrial revolution in Russia, provided the social basis for the creation of a liberal political movement demanding political rights and constitutionalism.
Finally, the world war I was the central reason for the revolution and its outcome. Russia was completely unprepared military, industrially and politically. By the end, the empire had lost large and rich portions of land and millions of men. This chaotic scenario made the revolution inevitable. The generalized dissatisfaction forced Tsar Nicholas II to abdicate and created a vacuum of power that led the Soviet party to slowly take control of the Russian administration.