Which ruler, crowned as the first Tsar in 1547, earned the epithet meaning 'terrible' or 'awe-inspiring' for his harsh reign?

• A Peter I
• B Boris Godunov
• C Ivan IV ✓
• D Vasily III

Ivan IV Vasilyevich was the first ruler to be formally crowned Tsar of All Rus'; his reign saw territorial expansion and the brutal oprichnina policy.