Remember, this is your own opinion. But 2 or 3 is probably a good answer.
D. because they were trying to separate from the south
Answer:
Leaders of the feudal states declared independence.
Explanation:
After the Zhou Capital was destroyed, many leaders saw a fracture in Zhou's government structure and see it as a chance to obtain the power for themselves.
This is why the leaders of the feudal states declared independence.
The lords took control of land which previously owned by Zhou and formed their own army which do not influenced by the Zhou's central government. These separation eventually contributed to Zhou's downfall.
Dehydration and starvation
