Question a-spec

3.2 Form, Structure, and Sense - Modifier placement and clarity
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A species of Byropsis algae produces toxins to avoid being eaten by predators. However, in some cases, the toxins the organism uses to protect itself from predation actually blank its attractiveness to predators. The Hawaiian sea slug, for example, not only tolerates Byropsis toxins but actually uses them for protection in the same way the algae does.

Which choice completes the text so that it conforms to the conventions of Standard English?

A.

is increasing

B.

increase

C.

increases

D.

has increased