Final answer:
The tapeworm body plan aids in dissemination through high reproductive capacity and ease of transfer between hosts, with a life cycle involving both primary and intermediate hosts.
Step-by-step explanation:
The tapeworm body plan supports widespread dissemination of the parasite primarily by having a high reproductive capacity and being easily transferred between hosts, as indicated by option (c). Tapeworms have a specialized structure called a scolex that allows them to attach to the intestinal wall of the primary host. Their bodies consist of long chains of proglottids, each containing reproductive systems that produce fertilized eggs.
These proglottids are released into the environment through the host's feces, where they can be consumed by an intermediate host, continuing the life cycle when these intermediate hosts are eaten by the primary host. This high reproductive output, combined with the ability to complete their life cycle in a variety of hosts, ensures the effective spread of the tapeworm.