A nonnative species of frog is introduced into a pond. Which of the following would be most likely to prevent the nonnative species of frog from becoming an invasive species?

A. A native frog species competes with the nonnative frog.

B. The nonnative frog can tolerate the pond's temperature,

C. The nonnative frog has no predators in the pond.

D. There are no other frog species living in the pond.