Answer:
The answer is C.
- Unrestricted submarine warfare
Answer:
Northerners who migrated from the south after the civil War that occured in the year of 1861
Explanation:
Emperor Diocletian would be the answer
Well those civilazations river valley all for farming in sumer they called did irrigation. they are the same too cause it helped for trade transportation most for farming it helped for bathing and food
The river valley civilizations used the rivers to travel as well as the
Indus River valley. But the difference is that once was blocked to the
world and one traded
This is the information I could find. Hope I helped and good luck!