Are the 24 solar terms the invention of ancient astronomers and working people in China?

In this problem, it is the obvious optimal choice. D is actually right, but it is slightly one-sided, because it is not only the Yangtze River basin, otherwise it will not be called the "24" solar terms of "China".

Twenty-four solar terms were invented by ancient astronomers and working people in China. The actual situation is this: in the process of production and labor, the working people in ancient China gradually discovered the law of the twenty-four solar terms by observing the changes of the sun, the moon and the stars, and after further observation, overall planning and calculation by astronomers, compiled the solar terms chronology, that is, the origin of the twenty-four solar terms.

Finally, the solar calendar is a kind of yin-yang calendar (that is, a calendar that comprehensively considers the relative changes of the movement of the sun and the moon).