Final answer:
Freud suggested that adults with oral fixations might exhibit passive dependence, likely due to issues during the oral stage of their psychosexual development.
Step-by-step explanation:
Sigmund Freud suggested that orally fixated adults exhibit certain personality traits resulting from issues during the oral stage of psychosexual development. According to Freudian theory, individuals who do not properly engage in or disengage from the oral stage can develop fixations, which in adulthood may manifest as overeating, smoking, or nail biting. The most likely behavior you're asking about is 1) a passive dependence, where such adults may seek oral gratification through such means as eating or smoking due to early weaning or issues during the oral stage. Messiness and disorganization, mentioned in option 5, are more commonly associated with an anaI-expulsive personality due to issues in the anaI stage of psychosexual development.