Correct option is D
Under the Command Area Development (CAD) program, On-Farm Development (OFD) includes a range of interventions to improve water use efficiency. These typically involve:
Construction of field channels and drains (A) to ensure efficient water distribution,
Reclamation of waterlogged areas (B) to restore land productivity,
Renovation of irrigation tanks (C) to ensure sustained water availability.
Hence, all three are valid OFD activities.