I want to know the answer to the following question:
What type of evidence indicated that the C-Group spoke Afroasiatic languages of the Berber branches?
All the background I'm provided with is that "Ceramics were discovered that were related to those of the C-Group (Temehu) pastoral culture, which inhabited the Nile Valley between 2500–1500 BC.". Is that enough to answer the question?
Answer: no