The correct options are
A They are archaeological sources and are writings carved on solid surfaces.
C Examples of inscriptions include Cholan inscriptions and Uttimerur inscriptions
D They provide valuable historical facts and provide rich information about a particular era.
Inscriptions are writings carved on solid surfaces such as rocks, stones, temple walls, pillars, slabs, copper plates, walls of buildings, etc. They provide valuable historical facts like important events, dates, details of battles, etc. Palm leaf and paper were used as alternatives due to high cost of copper plates.