Final answer:
Option d) According to the article, 'The findings are inconclusive' (Jones, p. 56).
Step-by-step explanation:
Out of the four options, the passage that handles MLA in-text citations correctly is option d) According to the article, 'The findings are inconclusive' (Jones, p. 56).
In MLA style, when citing a direct quote, the author's last name is mentioned along with the page number where the quote can be found. The correct format is (Author's Last Name, p. Page Number).
Therefore, option d) is the only passage that follows this proper format by including both the author's last name (Jones) and the page number (56) within the parentheses.