The correct option is C early Tamil literature attributed to the first three centuries of the Christian era.
'Sangam literature 'is early Tamil literature attributed to the first three centuries of the Christian era. A considerable part of the Sangam literature was produced in the early centuries of the Christian era. Sangam literature is the name given to the earliest available Tamil literature. It is dated between 400 BCE and 300 CE. The word 'Sangam' literally means association.