4. The example presented by the author in highlight text most clearly serves to illustrate
A. a situation in which a species is less vulnerable to biocontrol agents than it would have been to chemical pesticides.
B. a way in which the introduction of a biocontrol agent can affect a nontarget species.
C. a nonnative agent's adapting in an unpredictable way that results in damage to a new host.
D. The contention that biocontrol agents can harm nontarget species by competing with them for resources
E.
...
A. a situation in which a species is less vulnerable to biocontrol agents than it would have been to chemical pesticides.
B. a way in which the introduction of a biocontrol agent can affect a nontarget species.
C. a nonnative agent's adapting in an unpredictable way that results in damage to a new host.
D. The contention that biocontrol agents can harm nontarget species by competing with them for resources
E.
...


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