Which of the following best describes the sampling distribution of a sample mean?
(A) It is the distribution of all possible sample means of a given size.
(B It is the particular distribution in which My = M and of = 0.
(C) It is a graphical representation of the means of all possible samples.
(D) It is the distribution of all possible sample means from a given population.
(E) It is the probability distribution for each possible sample size.