The low water datum for a lake is defined as the surface of the lake when it is at elevation
(A) 180.5 m above M.S.L.
(B) 190.5 m above M.S.L.
(C) 170.5 m above M.S.L.
(D) 200.0 m above M.S.L.
(A) 180.5 m above M.S.L.
(B) 190.5 m above M.S.L.
(C) 170.5 m above M.S.L.
(D) 200.0 m above M.S.L.