Answer:
D.
All of the above, sorry I was wrong first I did more research and found more.
There are three types of helminths: flukes (trematodes), tapeworms (cestodes), and roundworms (nematodes)
Helminth is a general term for a parasitic worm. The helminths include the Platyhelminthes or flatworms (flukes and tapeworms) and the Nematoda or roundworms.