What is the most likely reason that the author begins and ends the text with the larger conversation about carbohydrates in the human diet but develops the argument about whole grains in the middle? Answers:
The author wanted to emphasize the controversy because conflict is more interesting to readers in general.

The author wanted to ultimately make a point about carbohydrates but use information about whole grains to prove that point

The author wanted to shame the reader for believing that carbohydrates were exactly like sugar and then prove the point by bringing it up again at the end.

The author wanted to discourage the reader from eating sugar and grains in favor of the universally-healthy fruits, vegetables, and beans to get carbohydrates