The Textbook Shows That the Quantity of Mozzarella Cheese Eaten

Multiple Choice

The textbook shows that the quantity of mozzarella cheese eaten by Americans and the number of civil engineering doctorates awarded in the U.S. have been changing in a similar way over the past few decades. What is this relationship between mozzarella consumption and the number of doctorates called?

A) Independence
B) Interdependence
C) Correlation
D) Causation