What was the purpose of missi dominici that charlemagne sent throughout his kingdom

The missi dominici ("envoy of the ruler" in Latin) were royal envoys sent by the Frankish King Charlemagne, who later became Emperor of the Holy Roman Empire, which encompassed much of western Europe.

He established this system to facilitate the administration of his extensive domain. A group of people of his confidence were regularly chosen to represent the court in remote territories of the kingdom. These were usually pairs of a laymen and an ecclesiastic.  

Its main purpose was to establish away the system in terms of facilitating the administration,

Its main purpose behind the establishment was in terms of facilitating with the administration of his extensive domain. Some group of people was selected away on the regular basis just as for the sake in representing the court in remote territories of the kingdom. These were usually set into the pairing of the laymen and also about the ecclesiastic.  

letter d is correct.

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.