What did the Zhou dynasty create with its new types of ironwork?
They developed stronger weapons.
They built stronger and safer buildings.
They turned the iron into steel for sharp swords.
They used the iron to build ships for fighting wars.

The answer B

:The Zhou Dynasty was able to hold absolute power until 776 BC when the Warring States Period began in China. ... A new form of iron replaced meteoric iron during the Chinese Iron Age called pig iron, which was easier to work with and malleable.

they build things useful

Explanation:

1. seasonal

2. frictional unenployment

3. the number of the labor force multiplied by 100 and then subtract the number of unemployed.

4. 4%

5. an increase in prices