Which of the following statements about parasitism is NOT true?
A. The host is generally larger than the parasite.
B. Smaller parasites often live as endoparasites within the body of the host.
C. Ectoparasites are attached to the outside of the host's body by specialized organs.
D. Some organisms and all viruses are obligate parasites and must live inside a host.
E. An efficient parasite usually kills its host.
Answer: E
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