Imagine that all members of your class have been tested to determine the level of 5-HIAA in their cerebrospinal fluid. Which of the following would you predict using this information?
A) Male classmates with low 5-HIAA levels will be more aggressive than those with high levels.
B) Low 5-HIAA levels will be associated with good exam performance.
C) High 5-HIAA levels will be associated with poor sleep patterns in males.
D) Male classmates with high 5-HIAA levels may not be alive 10 years from now.
E) Those with low 5-HIAA levels will be the thinnest persons in the class.