Instructions Full Game: These are multiple-choice quizzes with four possible answer choices that include all questions in a given set.     
Identify the following philosopher:

(121-180) Roman emperor from 161 to 180 and a Stoic philosopher. The last of the rulers known as the Five Good Emperors, and the last emperor of the Pax Romana, an age of relative peace and stability for the Roman Empire.
Peter Unger
Martin Heidegger
Marcus Aurelius