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". 

Example Input: [header] How to change trackpad settings on macbook pro [title] Find the system preferences. [step] Starting from your main desktop screen there are two ways to find the system preferences where the mouse and touchpad settings will be located : [title] Bring your cursor to the bottom screen and find the system preferences application. [step] The icon looks like a box with three gears inside it. <sep> (A) Open that to find all your system preferences. [substeps] Alternatively, you can use the spotlight feature. (B) On macbook pro this icon resembles a round blue square with a horizontal green dot on it. On other applications this icon is actually a box with a gear, and is small in appearance. (C) It can be located on the taskbar or in the upper left-hand corner of the window. [title] Let the system preferences application perform its work. (D) [title] Click the customize key in the dialog box. [title] Follow the on-screen instructions to change the customization function.
Example Output: A

Example Input: [header] How to make dead sea bath salts [title] Buy at least 1 lb. [step] ( 454 g) of dead sea salts. You can find these particular salts through online retailers and at some natural food or body care stores. <sep> (A) Call ahead to ensure they have what you are looking for. [title] Choose some essential oils to add to your bath salt mixture. (B) Typically, these salts will range from 120 to 140 grams per day. Lb: fresh sea salts are thinner than organic sea salts, making them more concentrated when mixed into bath or warm water. (C) [substeps] The lb is dried seaweed from a growing plant. Your sea salt comes from a plant, either live or dead. (D) [substeps] Lb salts are naturally salt-based, meaning they use a variety of ingredients. They are often sold in packs of 10 or 15.
Example Output: A

Example Input: A large black dog is walking down the street. He is holding the leash of another dog in his mouth. the second dog <sep> (A) walks up to the first dog. (B) allows the first to lead him wherever he goes. (C) follows the first to grab his leash. (D) does not even seem to like the dog.
Example Output:
B