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For each of 25 subjects, an investigator measured the severity of a speech disorder and the amount of a particular substance in the blood. The Pearson r for the relationship between these two sets of measures was 0.10. Which of the following would be the most appropriate conclusion to draw from this correlation coefficient?A. the subjects with the most severe disorder tended to have the smallest amount of this substanceB. the subjects with the most severe disorder tended to have the greatest amount of this substanceC. there is essentially no relationship between severity of the disorder and the amount of this substanceD. this substance causes the severity of the speech disorder to varyE. these two sets of variables are strongly related to each other because of their relationship to a third variable

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