Consider the following case: A 30-year-old woman arrives in the emergency department. She is diagnosed with a drug overdose. Assessment data reveal the following information: she has three children (18 months, 4 years old, and 14 years old); she is in the process of her second divorce; she took 25 diazepam (Valium) tablets (2 mg/tablet), which her doctor had given her for stress; she is unemployed; and she did not graduate from high school. Which theory (or theories) should be used to direct her care? What concepts from other theories could be used to enhance her care?