Which Statement(s) Pertaining to the Chi-Square Distribution Is True

Multiple Choice

Which statement(s) pertaining to the chi-square distribution is true?

A) The chi-square distribution is completely determined by the degrees of freedom.
B) The mean of the chi-square distribution is equal to the number of degrees of freedom.
C) The variance of the chi-square distribution is equal to two times the number of degrees of freedom.
D) b and c above
E) all of the above