Poison dart frogs live in the rainforest. They produce a poison by eating toxic fire ants. The only known predator is a snake, Liophis epinephelus. Which of the following factors is most likely a density-independent regulator of population growth of poison dart frogs in the rainforest?

Aclear cutting the rainforest

Blimited food source

Csusceptibility to disease

Dincrease in population of Liophis epinephelus