Brandon Has Discovered That on Days That He Either Doesn't

Multiple Choice

Brandon has discovered that on days that he either doesn't exercise or overdoes his exercising he feels extremely tired in the evening. On days that he does a moderate amount of exercise he feels quite refreshed in the evenings. Which of the following best describes the relationship between Brandon's exercising and how tired he feels?

A) highly positively correlated
B) moderately negatively correlated
C) linear
D) nonlinear
E) moderately positively correlated