Which of the Following Best Describes a Binominal Probability Distribution

Which of the following best describes a binominal probability distribution?

A) It is a probability distribution that shows the probabilities associated with possible values of a discrete random variable that are generated by a binomial experiment.
B) It is a probability distribution that shows, for each of a random variable's possible values, the probability of the variable being less than or equal to that value.
C) It is a probability distribution that shows the probabilities associated with possible values of a discrete random variable when the probability of success of these values changes from one trial to the next.
D) It is a probability distribution that shows the probabilities associated with possible values of a discrete random variable when these values equal the number of occurrences of a specified event within a specified time or space.