Which of the Following Is Not a Characteristic of a Binomial

Multiple Choice

Which of the following is not a characteristic of a binomial experiment?

A) The experiment consists of n identical and independent trials.
B) The probability of success on a single trial remains constant from trial to trial.
C) The standard deviation of the binomial random variable is the square root of the mean.
D) Each trial results in one of two outcomes.
E) All of these.