Which,if Any,of the Following Statements About the Chi-Square Test of Independence

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

A) If r_i is the 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 in the contingency table.
D) The alternative hypothesis states that the two classifications are statistically independent.
E) All of these statements are true about the chi-square test of independencE.