The important achievements of the Cushites include the following:
- B) The invention of one of the world's first alphabets - The Cushites contributed to the development of writing systems and alphabets in ancient Africa.
- E) The invention of papyrus - Though papyrus originated in ancient Egypt, the Cushites, being closely connected to Egypt, played a role in the usage and spread of papyrus as a writing material.
- F) Trade networks that stretched from Greece to South of the Sahara - The Cushites were part of extensive trade networks that facilitated commerce and cultural exchange within Africa and beyond.
These three options highlight significant contributions and achievements associated with the Cushites.