A native species and a non-native species are competing for resources within the same ecosystem. The non-native species is more likely to survive than the native species in which of the following situation?
A. Both the native species and the non-native species thrive on the same food source.
B. The native species in immune to certain pathogens in the ecosystem.
C. Predators prey on both native and non-native species.
D. The non-native species has no natural enemies in the ecosystem.