The correct options are
A The construction of the Kallanai dam
C Conversion of forests into agricultural lands
Karikalan did a lot for his people. For one, he converted forests into agricultural lands so that the people of his kingdom would have ample food. He went a step further and constructed a dam across the Kaveri river to provide water for all these agricultural lands. Although he won the battle of Venni, the lives of his subjects especially benefitted by his decisions to convert the forests into agricultural land, and build a dam.