Which of the following represents a valid probability distribution function? O O (B) X256 (C) 295 X 6 (D) 8256 X (A) X 2 5 f(x) 0.16 0.27 0.51 More than one of the above choices could represent a probability distribution function. 6 f(x) 0.83 0.39 -0.22 f(x) 0.42 0.53 0.05 f(x) 16 27 51 None of the above choices could represent a probability distribution function