Three of the following were ways in which charlemagne advanced learning. which was not

The answer to this item is “He wrote a history called "The Decline and Fall of the Roman Empire."  The history of the “Decline and Fall of the Roman Empire” is written by the English historian Edward Gibbon. The three ways in which Charlemagne contributed in advanced learning are: He created a palace school, brought scholars to live at his court and ordered monasteries to establish schools and libraries.

i think the answer would be: He wrote a history called "The Decline and Fall of the Roman Empire." For the most part, Charlemagne contributed to the advance learning by building several place and institution to help education, such as creating palace shools and ordering monastries to establish schools and libraries

The correct answer is b