It’s B ..................
Im pretty sure it's Silesia
Answer:
The main factor was water every civilization needs a water source then only can it flourish so nile valley flourished cause of the river the silt from it to farm and yearly flooding
Explanation:
1. mutual defense allies,
2. imperialism,
3. militarism,
4. nationalism,
5. immediate cause: assassination of Archduke Franz Ferdinand
Delivering mail and collecting duties and taxes !!
