Which statement about Charlemagne's achievements is not true?

AHe was crowned the first emperor of the Holy Roman Empire by Pope Leo III in a lavish ceremony in Rome.
BHe was a king of the Saxons who resisted the pope's efforts to spread Christianity throughout Gaul.
CHe established schools and supported monasteries in their efforts to preserve learning.
DHe waged war against the Lombards and the Moors and greatly expanded the territory of his empire.