The correct options are
C The villagers are not taking very good care of their tanks
D Villagers are not taking good care of the area from where water is coming into the tanks
In earlier times the village people together took care to repair the tanks, keep the area from where the water came to the tank clean and proper, and regulate the use of the tank water. This has declined rapidly in the last thirty years. As a result the tanks like Salakamcheuruvu have become dry.