A researcher conducted a one-way between-groups ANOVA to test for a difference in mean number of math problems completed among participants in four food conditions: snack 30 minutes before the assessment, full meal 30 minutes before the assessment, snack > 2 hours before the assessment, and full mean > 2 hours before the assessment. The calculated effect size was 2 = .08. Select the appropriate interpretation of effect size. a. There was a small difference in the mean number of problems completed among participants in the four food conditions. b. There was not a statistically significant difference in the mean number of problems completed among participants in the four food conditions. c. 0.08% of the variance in the number of math problems completed can be explained by food conditions. d. 8% of the variance in the number of math problems completed can be explained by food conditions