Final answer:
The behavioral causes of poor health outcomes most amenable to change are unstable and controllable, meaning they can vary over time and are influenced by individual actions.
Step-by-step explanation:
Attribution theory concerns how individuals infer the causes of events, others' behavior, and their own behavior. It is relevant to health outcomes because beliefs about what causes one's health conditions significantly affect their management and prognosis. The behavioral causes of poor health outcomes most amenable to change are b) unstable and controllable. This aligns with the concept that changeable (or unstable) and controllable attributions for negative health events allow for improved management and better health behaviors. For example, viewing health as controllable has been linked to proactive management of health conditions, as individuals feel empowered to alter their lifestyle choices and behaviors to positively affect their health.