Animals: Animal reproduction
Hermaphroditism is when a single organism can produce both female and male gametes. This makes reproduction easier, as an individual can mate with any other organism of the s
This is very common in invertebrates and is present only in sponges, but also on mollusks and earthworms.
This means that the sentence should read:
Sponges are hermaphrodites, which means one sponge produces both female and male reproductive functions.
So B is the correct answer.