Answer: They were barred from entering the school by National Guard troops and rioters. They were blocked by rioters but fought their way through
Explanation:
When Alexius I Komnenoi implored the pope (Urban II) for help, he meant it to reconquer the lost Byzantine lands (and therefore return in to their de facto ruler, a.k.a., the Byzantines). Urban however, decided to merely use that as a façade in order to then invade the Muslims, and retake the holy land.
He also saw the wanted to unite Christianity as a whole (All the sects at the time, Orthodoxy, Catholicism, Paulicianism, Iconoclasts, etc. into a single conglomerate, fighting a common enemy.)
Boycotting Jewish businesses.
B, a monopoly because when a company monopolizes other companies, it means they're buying them out, which results in no competition
