Iron metallurgy .a. metals production process imported into "China" towards the end of the Xia Dynasty Era b. restricted practice of metals production for nobles and completely forbidden to peasants c. a more abundant resource for metals manufacture that enabled Zhou dynasty rulers and their allies to expand the size of their territory via military campaigns d. metals production used exclusively in Northern "China"

c. a more abundant resource for metals manufacture that enabled Zhou dynasty rulers and their allies to expand the size of their territory via military campaigns

Explanation:

During Zhou dynasty  (1046-256 BCE), iron tools replaced bronze and its technology advanced in China and iron was used in producing better weapons. This was the beginning of the iron age in China which started around 600 CE.

after the civil war, and with the termination of slavery, the south was faced with a big problem; what was supposed to happen and how they were supposed to deal with the freedom and the rights that black people and freed slaves had gained as a result of the north defeating the south and forcing the end of slavery. first, most, if not all, of the workforce of the south came from slaves and they did not have an option to replace the loss of said workforce. second, particularly in the south, people were convinced that black people were lesser, less intelligent, less capable and less smart than whites. this posed a huge problem for them. also, southerners were faced with another issue; freed slaves now had a say in how their lives would be lived and the right to politically choose the way they would be governed. people in the south did not want to accept this, none of this and this opposition and the conflicts that arose from it, not to mention the afereffects of the war, forced the congress of the time to enact and enforce the reconstruction plans that had been proposed by president andrew johnson.

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