When the TWC lies below the JHC at all discharges, the problem can be solved by which of the following provisions?i. Constructing a sloping apron above the river bedii. Provision of roller bucket type of energy dissipatoriii. Provision of a ski-jump bucketiv. A sloping apron below the river bedv. Construction of a subsidiary damvi. A sloping apron partly above and partly below the river bed

• A. i, iii and v
• B. i, ii and vi
• C. iii, iv and v
• D. i, iii, iv and v