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".

Ex Input:
The wall breaks and the man flies down the hill into a tree. The man stands up next to the kayak and talks. the girl <sep> (A) walks off sequence while the camera follows. (B) gets into the kayak. (C) in red gets angry, and lays down in the water. (D) approaches the tree pointing and shaking it in the end.

Ex Output:
B

Ex Input:
[header] How to protect your intellectual property [title] Know the three types of intellectual property. [step] There are three different types of intellectual property that you and your business may have created. Each can be protected under the law, but there are different categories for each one. <sep> (A) A shortcut to remember the differences between the three is that a patent protects the invention, the copyright protects the artistic expression of the invention, and the trademark protects the brand name. [substeps] If you have invented an item or system that is new, useful, original, or ornamental, then you may be able to patent it. (B) [substeps] Trade secrets are the only kinds of intellectual property that you and your team can sell. Goodwill is the only type of intellectual property which you can earn without investment. (C) Realize the following basic categories : [substeps] Intellectual property. This is non-exempt from federal and state laws. (D) To protect intellectual property, you must be licensed, insured, and have information about how this performance impacts you and those involved. [substeps] Private intellectual property is allowed only if there are only two parties involved, or if the business isn't trademarked.

Ex Output:
A

Ex Input:
[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.

Ex Output:
B