Final answer:
The correct elements to consider for opioid therapy are the patient's medical history and comorbidities, severity and type of pain, and potential drug interactions, which leads to the choice of 'All of the above'.
Step-by-step explanation:
The elements that should be considered in the drug selection for opioid therapy are A. Patient's medical history and comorbidities, B. Severity of pain and pain type, and C. Potential drug interactions. Hence, the correct answer is D. All of the above. It is critical to take into account the full scope of the patient's health and the characteristics of their pain to ensure the most effective and safest opioid regimen is prescribed. This comprehensive approach is necessary to prevent complications and address the issues evident in the current opioid epidemic that has been partly fueled by the misuse of prescription pain relievers like hydrocodone and oxycodone.