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:
[header] How to tell if a cat has a sore throat [title] Notice a change in the cat's meow. [step] Your cat's meow can help you determine if they have a sore throat. Listen to them when they meow. <sep> (A) You will notice different tones of their meow in different environments. [substeps] A cat with sore throat may meow intensely or complain loudly. (B) Their meow might sound quieter, raspier, or thinner than usual. If there is a change in the way the meow sounds or a noticeable difference in the way the cat sounds, it might point to a sore throat. (C) Cats meow every time they've got a sore throat, at least once or twice a day. You might hear this meow a lot. (D) If they do meow, then your cat has a sore throat. [substeps] Cats meow because they are in pain.

Ex Output:
B


Ex 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.

Ex Output:
A


Ex Input:
[header] How to protect your cat from household hazards [title] Remove poisonous plants from your home. [step] There are many household hazards that can injure your cat or make her very sick. Poisonous plants are a common hazard for cats. <sep> (A) Examples of poisonous plants are aloe, lilies, and eucalyptus. Cats who eat poisonous plants can suffer from a range of illnesses, such as heart problems (lily of the valley) and kidney failure (rhubarb leaves). (B) If there are any one species in your home, it is important to remove the plants from the home and wear gloves when handling them. [substeps] Aphids can cause severe and even deadly poisoning when exposed to harmful chemicals, such as kerosene or citrus oils. (C) If you have a poisonous plant, be sure to safely remove it from your home. [substeps] Poisonous plants include poison ivy, poison oak, poison cyaters, and poison lime. (D) If your cat has any sick plants, remove them from her house completely. [substeps] Insect hazards like wasps, roaches, cockroaches, and flies can make an adult cat very sick.

Ex Output:

A