Which of the Following Statements Best Illustrates the Concept of Covariance

Multiple Choice

Which of the following statements best illustrates the concept of covariance?

A) "The population means are not all equal to each other."
B) "Students who score below the class mean on the midterm also score below the mean on the final exam."
C) "Not everyone is the same."
D) "People who differ in intelligence also differ in their personalities."