Correct answer: B. Macedonia
Explanation: Direct answer: Option B, Macedonia. Alexander the Great was the king of Macedonia, a kingdom in the northern part of ancient Greece. He became king in 336 BCE and conquered a vast territory stretching from Greece through the Persian Empire to parts of Central Asia and India. Option A, Rome, is wrong because Rome was a separate power that rose to dominance later; Alexander did not rule as a Roman king. Option B, Macedonia, is correct because Alexander inherited and expanded the Macedonian kingdom. Option C, Spain, is wrong because Spain was not his homeland or kingdom. Option D, Egypt, is wrong as the answer to this question: Alexander conquered Egypt and founded Alexandria, but he was not originally the king of Egypt. The memory cue is “Alexander = Macedon; Egypt was conquered.” This distinction prevents the common mistake of choosing Egypt merely because he ruled there for a time.