Answer:
By article 25 of the Treaty of Berlin, 1878, Austria-Hungary was permitted to occupy and administer Bosnia and Herzegovina. The crisis in 1908-1909 sprang from the fact that Serbia believed that she must prevent the consummation of annexation by Austria-Hungary or give up permanently her long-cherished hopes.
1-the pressure of middle-age church
2-The kings of several German states were sick of paying taxes to Catholic Church so they supported Luther in order to get rid of them
(There are more reasons for sure