What is a Kremlin? A) a tall Bell Tower used to call Russian citizens to prayer B) a multi-domed Cathedral at the heart of a Russian city C) a walled Fortress designed to protect a Russian city D) a place where the tsar and his family resided

The Kremlin is where Putin currently lives. It is a palace and several assisting buildings, with a wall around the whole thing. The Multi-domed building is St. Basil's Cathedral. The Tsar was probably in another palace, on the run from Rasputin.