Explain why an herbivore that consumes many different species of plants might be less successful at regulating the abundance of a well-defended plant species compared to an herbivore that specializes in eating a single species of plant.
A. Generalist herbivores lack specific digestive enzymes
B. Specialized herbivores have higher metabolic rates
C. Generalist herbivores face less competition for food
D. Specialized herbivores are more susceptible to predation