The characteristics that distinguish phylum Annelida worms from simple worms include(s)
A. nephridia, a heart, and, in some cases, jaws.
B. the lack of a true digestive system.
C. metamerism.
D. nephridia, a heart, metamerism and, in some cases, jaws.

D. nephridia, a heart, metamerism and, in some cases, jaws.

Explanation:

Since the organism in Phylum Annelida worms and simple worms seems very common but they have may differences, which are as following:

Nephridia: Nephridia are the paired excretory organs that occur in the Annelida phylum. They discharge metabolic water from the body, I is not present in simple worms as roundworms.Heart: aortic arches are present in earthworms (Annelida), which pump blood out into the network of vessels that run in a circuit through the body. Metamerism: Metarism defines the segmented body characteristic of annelids which is not found in other simple worms. It is easily visisble in earthworms.

Hence, the correct answer is D.

I’m not really sure