2. Which of the following statement concerning the treatment of cancer pain is least likely? (A) Obeying the principles of the analgesic ladder approach, 71% of patients will achieve good in relief without further intervention. (B) Oral morphine remains the drug of choice according to the analgesic ladder of the WHO. (C) The most common use of radiotherapy is for metastases abdominal pain. (D) The patient with advanced cancer is in the dynamic state with changing pathology. (E) About 60% of patients who receive radiotherapy will achieve at least 50% pain relief.