When high flood passing down weir creating high up lift pressures and there is no flow in the canals, if such condition is taken for design and is called__________________?

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When high flood passing down weir creating high up lift pressures and there is no flow in the canals, if such condition is taken for design and is called__________________?

A. High flood level
B. Dangerous condition
C. Hydraulic design condition
D. Worst condition