It restored the prewar boundaries between the United States and Canada.
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Answer:
The start of Islam is marked in the year 610, following the first revelation to the prophet Muhammad at the age of 40. Muhammad and his followers spread the teachings of Islam throughout the Arabian peninsula. Soon after the death of the prophet
Irish monasteries became famous for their learning and many students came to study in them from other parts of Europe. Irish monks also spread Christianity across Europe.
The asnwer is A they were overcrowded and unclean
The assassination of Archduke Franz Ferdinand set off a chain of events among European alliances that led to war.