They don't reproduce, as far as I know. They are produced in bone marrow.
Answers;
Ancient China
Earthenware, stoneware, and bronze were common mediums used in ancient China.
Earthenware is clay fired at relatively low temperatures of between 1,000 to 1,150 degrees.
Stoneware is made from a particular clay which is fired at a higher temperature of 1,200°C. This results in a more durable material, with a denser, stone-like quality.
The answer is a. I learned about this in psychology.