What were the effects of the Zhou metal workers mastering iron? (1 point)
Responses
Iron helped the Zhou rulers so much that they reserved the Mandate of Heave for themselves alone
Iron helped the Zhou rulers so much that they reserved the Mandate of Heave for themselves alone
The Zhou jealously guarded the secret of smelting iron and created a trading empire
The Zhou jealously guarded the secret of smelting iron and created a trading empire
The Zhou conquered the warlords and were the first to unify China
The Zhou conquered the warlords and were the first to unify China
Iron made stronger, more effective farm tools and increased crop yield.