I believe the answer would be C, burning fossil fuels. Oil and gas is made up of the remains of microscopic plankton. Over millions of years the remains become the carbon-rich coal, oil and gas we can use as fuel. When fossil fuels are burned they release carbon dioxide into the atmosphere, thus contributes to global warming.
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.
