The Following Questions Refer to the Paragraph Below

The following questions refer to the paragraph below.
An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish.
-If the worms discovered during the autopsies have all features characteristic of their phylum, dissection of the worms should reveal the presence of 1. nephridia.
2) chaetae.
3) segmentation.
4) a gastrovascular cavity.
5) the acoelomate condition.

A) 5 only
B) 1 and 2
C) 4 and 5
D) 1, 2, and 3
E) 3, 4, and 5