During the Eastern Zhou Dynasty's Spring and Autumn Period,which of the Following

Multiple Choice

During the Eastern Zhou dynasty's Spring and Autumn period,which of the following resulted in a political power shift from the central state to local authorities?

A) Cheaper and more abundant weapons,products from new iron smelting techniques
B) New discoveries in hydrology increased the power of rural agriculture.
C) New sextants,which allowed local rulers to create accurate calendars without the royal astronomers
D) New interpretations of oracle bones discouraged local gentlemen from supporting the central state.