Which of the following statements are true for the Sangam age?

A. Trade activity led to the emergence of a few urban enclaves.

B. The Tamil - Brahmi inscriptions offer brief glimpses into aspects of village life in Tamilakam.

C. Rulers depended on tribute and plunder for their sustenance.

D. The rulers had full control over the agrarian plains.

E. Sangam age was an age of tribal chiefdoms.

Choose the Correct answer from the options given below: