Why did the soviet union join the allies?

stalin was afraid of hitler.
hitler had broken a pact and attacked.
hitler was becoming too powerful in eastern europe.
stalin wished to take control of territories captured by germany.

Its B Hitler had broken a pact and attacked.

hernan cortes;

explanation:

abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.