What Are Predator/prey Relationships an Example Of,and Why

Multiple Choice

What are predator/prey relationships an example of,and why?

A) Positive feedback,because more predation leads to higher prey populations as they increase reproduction to insure survival.
B) Positive feedback,as more prey discourages further predation allowing prey populations to flourish.
C) Negative feedback,because prey populations tend to achieve a balance with the number of predators.
D) Negative feedback,because the prey cause the predators to die.