What were the effects of the Zhou metal workers mastering iron? (1 point)

Question

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.

Answer 1

Iron made stronger, more effective farm tools and increased crop yield.