Silk-making techniques were first invented in China some _______ years ago.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 7000.
The earliest silks discovered in China date to roughly 3630 BC, indicating that they are from the Chinese Neolithic period.
Silk was found throughout Henan Province, which is usually regarded as the origin of Chinese civilisation.
Empress Leizu's development of silk in ancient China is considered the beginning of sericulture.