GMAT Sentence Correction (SC) | Eating saltwater fish may significantly reduce the risk of

Eating saltwater fish maysignificantly reduce the risk of heart attacks and also aid for sufferers of rheumatoid arthritis and asthma, according to three research studies published in the New England Journal of Medicine.

Issue: Parallelism

Analysis:
1. Sentence core:"fish may reduce ... and aid ... "

I have highlighted the issuesbelow:

(A) significantly reduce the risk of heart attacksand also aid for
- "and also" is redundant
- "aid for" is not parallel with
...

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