Which set of characters belongs to the same phylum?

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Annelida exhibit an organ-system level of body organization and bilateral symmetry. They are triploblastic, metamerically segmented, and coelomate animals. Their body surface is distinctly marked out into segments or metameres and, hence, the phylum name Annelida (Latin, annulus : little ring). They possess longitudinal and circular muscles that help in locomotion. Aquatic annelids like Nereis possess lateral appendages, parapodia, which help in swimming. A closed circulatory system is present. Nephridia (sing. nep