What led to the population increase in china during the tang and song dynasties?

Explanation:

The population of China doubled in size during the 9th, 10th and 11th centuries. This growth was made possible by expanded rice cultivation in central and southern Song, the use of early-ripening rice from south-east and southern Asia, and the production of widespread food surpluses.

the answer you are looking for is letter c. he supported the idea of a un-run war in serbia to bring peace to the area.

supporting this idea was an important step that bill clinton took in order to attempt to secure bosnia and keep the peace there. he led peace reconciliations -known as the dayton agreement- leaving bosnia as a single state made up of two parts with one central government.