GMAT Sentence Correction (SC) | Schistosomiasis, a disease caused by a parasitic worm, is

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 ofthe freshwater snails that are the parasite's hosts for part of its life cycle .

Issues:Diction | Modifier | Verb Tense

Analysis:
1. The sentence talks about a disease caused by a parasitic worm that has become widespread due to enlarging habitat of the freshwater snails.
2. The options have couple of things wrong in them
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