Is C and D true or false

c. If F = (f(x, y, z), g(x, y, z), h(x, y,z)) is a vector field such that f, g and h have continuous second partial derivatives on R3, then V . (V x F) = 0. d. If F = (f (x, y, z), g(x, y,z), h(x, y, z)) is a vector field such that f, g and h have continuous second partial derivatives on R3, then V x (V . F) = 0