The achievements of the tang and song dynasties include
a.
the creation of the caste system
b.
the invention of gunpowder and the growth of confucianism
c.
the unification of japan
d.
the spread of islam throughout china

The achievements of the Tang and Song Dynasties include "the invention of gunpowder and the growth of Confucianism".

The Song dynasty (960-1279) takes after the Tang (618-906) and the two together constitute what is regularly called "China's Golden Age."

The utilization of paper cash, the presentation of tea drinking, and the innovations of gun powder, the compass, and printing all happen under the Song. (The way that the tradition traverses the year 1000 may make it simpler for students to find these advancements in time.)