You will be given a definition of a task first, then some input of the task.
In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".

[header] How to reduce physical pain with medication [title] Determine the type of pain you have. [step] The pain medication you use depends on the type of physical pain you have. You should decide if you have mild, moderate, or severe pain. <sep> (A) [substeps] Moderate pain is caused by a particularly hard or painful region (e.g., a thigh). Moderate-grade pain is felt in a wide range of locations including the breast area, scrotum, backside of your genital region, and groin area. (B) Then decide if the pain is acute, which means severe but temporary, or chronic, lasting for a long time or a returning condition. [substeps] Figure out the location of the pain. (C) A mild burning sensation may mean you have serious physical pain. Chronic pain (such as persistent pain for long periods of time) is less common, and should probably go away on its own. (D) Your doctor should be able to help you assess whether that is the option for you. [substeps] Mild, moderate, or severe pain is often localized to a joint.
Output:
B