Final answer:
The correct goal statement for pain management is to reduce pain to a level acceptable to the patient, considering their preferences and goals.
Step-by-step explanation:
The valid goal statement for measuring & managing pain is c) Reducing pain to a level acceptable to the patient, taking into account their goals and preferences. This approach is aligned with patient-centered care and ethical medical practice, as it takes into consideration the patient's individal circumstances, values, and desires regarding their health outcomes. The goal should not be to eliminate pain entirely if it means neglecting patient preferences or inducing adverse side effects, nor should it ignore pain management altogether.