Consider the following statements about Bligh’s Creep Theory.i. Creep length is the length of path traversed by percolating waterii. To increase the path of percolation vertical cut-off or sheet piles can be providediii. Loss of head per unit creep length is hydraulic gradientiv. Bligh gave no criteria for the safety of weir against underminingWhich of the following statements are correct?

• A. i, ii, iii
• B. ii, iii, iv
• C. i, iii, iv
• D. i, ii, iv