B is the answer
Hoped I helped!
You can simply go to the website
<span>PubMed.gov
Type in the words
</span><span>Irritable bowel syndrome
Go through the results and pick out the one you think is the most related.
This is one article that I think is related to what you're looking for:
</span><span>"New insights into the pathogenesis and treatment of irritable bowel syndrome."</span>This is the link: https://www.ncbi.nlm.nih.gov/pubmed/28135659
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