Why Did the Russian Military Invade Georgia in 2008

Why did the Russian military invade Georgia in 2008?

A) because the Kazakh forces attempted to take Georgian territory from the Russians
B) because the Georgian government attempted to establish control over the regions of Abkhazia and South Ossetia, which are two regions dominated by Russian sympathizers
C) as a warning to Chechen rebels to desist from any future terror attacks on Russian soil
D) because the Georgian government aided terrorists who committed various terror attacks within Russia
E) to establish forward military bases from which to attack Turkey