After the period of weakness following Pax Romana, who made significant reforms-such as increasing the Roman army-to strengthen Rome again? A. Marcus Aurelius B. Diocletian C. Maximian D. Constantine

It was Maximian. He was also co-ruler with Diocletian. He was more involved in military affairs while Diocletian handled political matters involving the Roman Empire. He was known for his military prowess and in suppressing several rebellions that threatened the empire.