How did charlemagne’s rule affect europe? a blocked invasions by magyars, vikings, and huns b extended christianity to western and northern europe c opened the iberian peninsula to arab conquest d rejoined the western and eastern roman empire

B extended Christianity to Western and northern Europe

Charlemagne (742-814), who considered himself a devoted Christian, vehemently sought to unite all the Germanic people into one kingdom and convert them all to Christianity.  

He did, indeed, achieved his purpose. He conquered the Lombards (Northern Italy now), the Avars (Austria and Hungary now) and Bavaria, among others, and for three long decades waged battles on Saxon, a Germanic tribe of "pagan" worshipers, until they were and forced to convert to Christianity: if they didn't follow the Christian traditions, they would be killed.

He also instituted economic and religious reforms, gave money and land to the Christian church, directed revisions of the Bible, protected the popes, was crowned Charlemagne emperor of the Romans in 800, at St. Peter’s Basilica in Rome by Pope Leo III.

yes

explanation:

the fighting words doctrine, in united states constitutional law, is a limitation to freedom of speech as protected by the first amendment to the united states constitution. in 1942, the u.s. supreme court established the doctrine by a 9–0 decision in chaplinsky v. new hampshire.

cruel, heartless

explanation: