Which If Any of the Following Statements About the Chi-Square

Which if any of the following statements about the chi-square test of independence is false?

A) If r_i is row total for row i and c_j is the column total for column j,then the estimated expected cell frequency corresponding to row i and column j equals (r_i) (c_j) /n.
B) The test is valid if all of the estimated cell frequencies are at least five.
C) The chi-square statistic is based on (r-1) (c-1) degrees of freedom where r and c denote,respectively the number of rows and columns n the contingency table.
D) The alternative hypothesis states that the two classifications are statistically independent.
E) All of the above statements are true about the chi-square test of independence.