"Controlling the Solomon Islands would protect Australia" is the reason among the choices given in the question why <span>many of the first island hopping battles in 1942 take place in the Solomon Islands. The correct option among all the options that are given in the question is the second option. I hope the answer helps you.</span>
The effects of Zhou metal workers mastering iron were…
Option A: during the Zhou dynasty, China was characterized by warfare, political and military reforms, but it was first unified during the Qin dynasty.
Option B: it is true that with the introduction of iron, China acquired stronger and more effective farm tools as well as increasing crop yield.
Option C: during the Zhou dynasty China not only developed iron technology but also improved technology of war making better weapons by means of smelted iron. As a result, iron weapons spread to the masses, contributing to the Warring States period.
Option D: it is also true that the Zhou jealously guarded the secret of smelting the iron and created a trading empire. The iron production encouraged trade and improved the empire economy.
Option E: Zhou craftsman are known for their iron art and it is still sold today. During the Zhou period, the craftsmanship had great importance for his skills for producing sophisticated iron weaponry.
Option F: Iron helped the Zhou rulers so much that they reserved the Mandate of Heaven for themselves alone. It was a period of cultural and intellectual expansion during Zhou era and the iron helped rulers keep the control of the land
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I think the answer is the 10th Amendment