The important achievements of the Kushites among the options given are:
- The development of Africa's first iron-working city
- The famous text, The Book of the Dead (notably associated with ancient Egyptian culture, but the Kushites adopted and continued many aspects of Egyptian culture, including religious texts)
- Trade networks that stretched from Greece to south of the Sahara
The other options, such as the defeat of the Assyrian army and the invention of papyrus, are not directly attributable to the Kushites.