The correct option is A Bisexual
Bisexual animals, also called as hermaphrodites are the organism having reproductive organs normally associated with both male and female sexes. Many invertebrates and a significantly smaller number of vertebrates are hermaphrodites. Echinoderms are marine invertebrates. They include sea stars, sea cucumbers, sea urchins and sand dollars. Some of the most well-known echinoderms are also hermaphrodites. Thus, the correct answer is option B.