1. The rulers who came to power after Charlemagne failed to defend the empire.
2. Europe was threatened by Muslims, Magyars, and Vikings in the 9th and 10th centuries.
<span> 2.40 percent in 2015</span>
The baby boom is also called Post-World War II baby boom, and this already reveals the cause: after the war the economy was raising again, after hard times, and people were optimistic about the future
I believe it’s called Graded exposure therapy but I’m not sure
