Why is a third-degree polynomial function with a negative leading coefficient not appropriate for modeling nonnegative real-world phenomena over a long period of time

A. The negative leading coefficient causes the function to rise over time, thus leading to negative values.
B. The negative leading coefficient causes the function to rise over time, thus leading to extremely large values.
C. The negative leading coefficient causes the function to fall over time, thus leading to negative values.
D. The negative leading coefficient causes the function to fall over time, thus leading to extremely large values.