Most Cnidarians Are Known to Produce Toxins

Multiple Choice

Most cnidarians are known to produce toxins.In fact,it has been claimed that one particular species produces the most deadly of all toxins on the planet.What feature of this group most likely evolved simultaneously with the evolution of these toxins?

A) the medusa body form
B) asexual reproduction
C) a slow-moving or sessile lifestyle in the adult
D) diploblastic design