Which of the following achievement occurred during the tang and song periods?
a. chinese painters captured busy city live in a new way
b. the building of the great wall of china began
c. a technique for making procelain why is perfected
d. the silk road came into existence

The correct answer is option "C".

A technique for making porcelain was perfected during the Tang and Song periods. Between 618 and 907, one of theTang Dynasty's achievements was concerned with a high technical method used to produce celadon porcelain in a large scale. However, the porcelain wares of the Song Dynasty (960 - 1279) was the best in the world, since potters produced an excellent combination of shape, glaze and decoration due to their great skill when making pots as well as firing techniques and glaze making.

a.opium

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