Which of the Following Distributions Approximates the Kruskal-Wallis Test Statistic

Multiple Choice

Which of the following distributions approximates the Kruskal-Wallis test statistic H when the problem objective is to compare k distributions and the sample sizes are greater than or equal to 5?

A) Normal.
B) Chi-squared distribution with k - 1 degrees of freedom.
C) Student t-distribution with k - 2 degrees of freedom.
D) Either chi-squared distribution with k - 5 degrees of freedom or Student t-distribution with k + 5 degrees of freedom.