The researcher calculates the expected counts for a cross-tabulation for age against income, as follows: Which of the following is the most correct regarding this test? Select one: a. Since none of the expected counts are less than 5 , the test is invalid; the researcher should conduct an ANOVA test instead. b. Since none of the expected counts is less than 5 , the test is valid and no further adjustments are necessary. c. Since there are four rows less than 5 , the test is invalid, and age groups 1-4 should be grouped together. d. There are too many rows and columns for the test to be valid. The researcher should reduce the number by grouping age and income categories. e. Income category 7 ("rather not say") should be removed from this test