Which of the following statements is true about the 24 Solar terms?
选项：

A:The 24 Solar Terms is based on the lunar calender.
B:The 24 Solar Terms originated from the middle and lower reaches of the Yangtze River.
C:The 24 Solar Terms finally came into being as early as in the Zhou dyanasty.
D:The 24 Solar Terms has acted as a guidance in Chinese farming and is still in practice.