Schistosomiasis, a disease caused by a parasitic worm, is prevalent in hot, humid climates, and it has become more widespread as irrigation projects have enlarged the habitat of the freshwater snails that are the parasite's hosts for part of its life cycle.
the freshwater snails that are the parasite's hosts for part of its life cycle
the freshwater snails that are the parasite's hosts in part of their life cycle
freshwater snails which become the parasite's hosts for part of its life cycles
freshwater snails which become the hosts of the parasite during the parasite's life cycles
parasite's hosts, freshwater snails which become their hosts during their life cycles
Choice D: This choice has similar error as choice C does. In addition, this choice is more wordy since it does not use pronoun “its”. It repeats the noun – parasite’s.
Choice E: This choice has similar meaning error as in choice C. It also has pronoun number error as in Choice B.
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