Which of the following statements is true?

a. None of the suggested answers are correct

b. A chi-squared goodness-of-fit test is always a two-tailed test.

c. In a goodness-of-fit test, all of the proportions specified in the null hypothesis must be always equal to each other.

d. In a goodness-of-fit test, if the expected frequency of a cell is less than 5, you should increase the significance level.

e. The alternative hypothesis in a goodness-of-fit test is that none of the proportions are equal to their values specified inH0.