What were the effects of the Zhou metal workers mastering iron? Select the two correct answers.
A.
The Zhou conquered the warlords and were the first to unify China.
B.
Iron made stronger, more effective farm tools and increased crop yield.
C.
Iron weapons spread to the masses, contributing to the Warring States period.
D.
The Zhou jealously guarded the secret of smelting the iron and created a trading empire.
E.
Zhou craftman are known for their iron art and it is still sold today.
F.
Iron helped the Zhou rulers so much that they reserved the Mandate of Heaven for themselves alone.
would it be C and F ?
A C
Who knows! it only goes this far! for now...
I know it's b and c
@Writeacher the link doesn't work for me
The iron plough greatly increased crop yields, leading to a population explosion. The number of commoners rose to outstrip the aristocracy’s ability to exercise control. Furthermore, iron technology led to a new generation of weapons, far cheaper and easier to make than the bronze weapons of earlier generations. Spears, pikes, battle axes, and knives could now be supplied to commoner infantry troops, and the role of aristocratic chariot warriors rapidly diminished. As populations grew, wars came increasingly to pit huge infantry armies of commoners against one another, in service of their kings. By the end of the Warring States period, million-man battles were being fought on the plains of eastern China. The political stakes had risen many-fold since the aristocratic heyday.
http://factsanddetails.com/china/cat2/sub2/entry-5396.html
Read carefully.