Which groups of people most directly benefited from song innovations and the song dynasty’s open border policy select all that apply

a farmers

b landowners

c merchants

d missionaries

e soldiers

The right options are:

A farmers

B landowners

C merchants

Explanation:

The Song era was a period of economic prosperity, inventions and improvements. A major technological innovation of the Song period was the development of new varieties of rice and the application of new sowing techniques, which increased productivity and rice production. Increased urban population and wealth encouraged farmers to grow more lucrative crops such as sugar, oranges, cotton, silk. All of this benefitted farmers,  landowners and merchants, of course.