The statement that best describes how J. Frank Dobie's work could be revised for a culturally diverse, contemporary audience is: He could have published Mexican American voices in his journal.
This choice directly reflects an effort to include underrepresented voices that are relevant to the cultural context of Dobie's work, which often focused on American folklore and regional narratives. Including Mexican American perspectives would not only diversify the content but also make his work more relevant and resonant with a modern audience.