Who was Alexander the Great?. . A.. the Persian leader who overtook the Greeks and established the largest empire in Europe. . B.. the Macedonian king who took control of the Greek city-states and established an empire that stretched as far east as India. . C.. the Athenian leader who studied under Aristotle, but thought philosophy was a useless pastime that interfered with his study of martial arts. . D.. the Greek warrior who hoped to conquer the entire world so he could help people become as comfortable as possible.