It’s (b) sorry for answering late
They forced nations to go to war I think.
Answer:Please specify a graph
Explanation:
A collapse of their newly independent nations. Although the diverse ethnicities were unhappy under the Austro-Hungary empire, they were secure under the government.
Hajj unites Muslims because it brings them together to perform an act of worship towards God (Allah). They all perform Hajj to obey Allah and seek forgiveness. Hajj is also performed at a specific time (i.e in the lunar month of Thul-Hijjah) so a lot of Muslims congregate to do this mandatory act of worship.