Dr. Luigi has discovered that the more spaghetti people eat, the less likely they are to be diagnosed with depression. Based on this finding, what statement can be made about the relationship between spaghetti and depression?
A) Italians are happy.
B) Spaghetti prevents depression.
C) There is a positive correlation between spaghetti and depression.
D) There is a negative correlation between spaghetti and depression.
Correct Answer:
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