Parasitism Is One of the Most Widespread Life Strategies Ever

Parasitism is one of the most widespread life strategies ever to evolve.Which of the following is consistent with this finding?

A)Parasites almost always predigest their hosts' tissues and therefore spend less energy and require fewer structural adaptations.
B)Parasites,unlike predators,feed on almost all the tissues of their host.
C)Parasites do not generally kill their hosts,thus they can feed on the same host throughout the host's normal life span and do not have competition from decomposers.
D)Parasites generally kill their host and can feed for a very long time because they are much smaller than their host.

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