Which of the following predictions aligns with the hypothesis formulated by Hairston, Smith, and Slobodkin (1960, American Naturalist)?

A. If the ragwort were to become nontoxic, cinnabar moths would consume all remaining ragwort plants.
B. In the Welsh experiment, no grass would survive outside the fences.
C. In Venezuela's Lago Guri, six of the islands investigated by Terborgh and colleagues were dominated by different plants in the end.
D. Australian koalas tend to eat eucalyptus leaves containing less formylated phloroglucinol compounds.