Available choices:
[a]. barnacles.
[b]. refraction of light.
[c]. layers of fat.
[d]. Epidermis.
[e]. tough membranes.
[f]. ocean water.
[g]. gastropod shells.
[h]. epidermis and dermis.
Given those answer options, answer the question: Fact 1: Tunicates reproduce sexually. Fact 2: Tunicates are sea creatures encased by tough membranes, reminiscent of tunics. Given the two facts above, sea creatures encased by what reproduce sexually?
A:
[e].