The correct answer is C) To have the capital near better trade routes.
Constantine moved the capital of the Roman Empire to have the capital near better trade routes.
Roman Emperor Constantine decided to move the capital of the Roman Empire to Constantinople in 330 CE. The place, Byzantium, later renamed Constantinople(modern-day Istambul, Turkey). As the emperor of the great Roman Empire, Constantine thought that by moving the capital from Rome to Constantinople, the Empire could benefit from trade and improve the future and greatness of the empire. The decision turned out to be correct. Constantinople became the most important trade city and cultural center of the Empire.