According to the Treaty of Verden: a) Charlemagne divided the Frankish empire 4 sons
b) Saxons recognized the rule of Charlemagne c) The sons of Ludwig the Devotee divided the Frankish empire
d) Arab infiltration into the Frankish state was stopped

i think the answer is A sorry if its wrong...

Explanation:

In 813, Charlemagne crowned his son Louis the Pious (778-840), king of Aquitaine, as co-emperor. Louis became sole emperor when Charlemagne died in January 814, ending his reign of more than four decades. At the time of his death, his empire encompassed much of Western Europe.

answer: born in saint-dié, in the vosges department, france, he studied law, and was called to the bar at paris in 1854,[2] but soon went into politics, contributing to various newspapers, particularly to le temps. he attacked the second french empire with great violence, directing his opposition especially against baron haussmann, prefect of the seine department. a series of his articles in le temps was later republished as the fantastic tales of haussmannlaxupa (1868).[2]

explanation: