Based on my expertise in academic writing and citation styles, the sentence that contains a correct signal phrase for the specified source is:
D) Philosophy professor Christopher Ciocchetti states, "What we eat shapes who we are, what we experience, and how we interact with others" (2).
This option correctly attributes the quoted text to the author of the article, Christopher Ciocchetti, by using the phrase "Philosophy professor Christopher Ciocchetti states".
Options A and B incorrectly attribute the quote to the Journal and Article titles respectively, rather than the author.
Option C provides the quote but no signal phrase to indicate the source and author of the quote.
Therefore, D is the only option that properly introduces the quote using an accurate signal phrase identifying Christopher Ciocchetti as the author of the quoted material from the specified article. This adheres to academic citation standards and clearly signifies who is being quoted.