Why is E correct? Why is D incorrect?

Hi @Ryan-Mahabir, To first clarify why (E) is correct, we can look at line 60, where the author of passage B references "muscle proteins." No such reference to proteins exists in passage A (if you find one, let me know!). As for why (D) is incorrect, if we take a look at passage A at line 4, we see the author tell us that "virtually no discussions of it have appeared in scientific publications." This is an explicit mention of the prevalence of scientific discussion about the topic, where the author thinks that this prevalence is basically 0. Hope this helps!

Follow up question Shunhe, I see where it mentions muscle proteins in passage B, but it does not state that large amounts of protein are necessary. How do we make that jump?

I also had this question. I was deterred from choosing (E) because it said "large amount" and the passage did not quantify.