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". 

Input: Consider Input: [header] How to know if your dental fillings need replacing [title] Watch for tooth sensitivity. [step] If you have fillings that need replacement, you'll likely feel it first. Paying attention to the physical symptoms of old or decaying fillings can let you know if it's time to have your dentist replace them. <sep> (A) One sign that your fillings may need replacing is if you have tooth sensitivity to temperature, sweets, or pressure. [substeps] Pay attention when you bite into any cold, hot, or sweet foods. (B) Teeth sensitivity occurs when gums become severely stained with white blood. These white discolorations are mainly due to gum disease, but most commonly introduce a white blood cell colony to the side of your mouth. (C) Once your doctor notices an increase in tooth sensitivity, he or she can return you to the dentist. [substeps] Are your teeth hurt or moist? Severe tooth pain, cramping, sensitivity, or tingling are all signs that they need replacement. (D) [substeps] Bad tooth sensitivity is usually not a problem until it gets worse and you start to feel pain. You may experience sensitivity at night and bad teeth at the same time.

Output: A


Input: Consider Input: [header] How to buy wine for a gift [title] Go mid-range to high end. [step] It's tempting to buy a cheap wine to give as a gift, particularly if you don't know much about wines. However, cheap wine will taste cheap. <sep> (A) Buy the cheapest wines possible at low prices for a lot of fun and a nice gift. [substeps] Vintage wine is well worth the cost, but it won't taste well if you're not buying the bottle. (B) A higher end wine will go right up top and faster, so full quantities have more potential to go up the price of a bottle. [substeps] Anyway, consider your palate when determining whether a bottle is a good choice for your party. (C) [substeps] Spend time visiting upscale restaurants near your destination and learn about wines on your visits. Ask for the wine they recommend to see if you can trade it for cheaper. (D) That's not to say that you can't get a decent wine for a reasonable price. You just don't want to pick the cheapest wine, especially if you've never tasted it yourself.

Output: D


Input: Consider Input: [header] How to write a prologue for your novel [title] Use the prologue to provide backstory. [step] One way to use a prologue is to provide backstory on a character or several characters. This can help you, as the writer, avoid using other tricks like flashbacks or inserted backstory in the novel. <sep> (A) This is a good way to have realistic predictions about your character or characters and to provide backstory about your characters. [substeps] Part of this skill is learning how to steer yourself in the backstory without overusing backstory as an opportunity to tell your story in your own person. (B) You also need to provide backstory to make your novel a reality. [substeps] Use your intro to provide backstory. (C) You may also be able to use the prologue for your readers in your sequel, but instead for you each chapter. [substeps] For example, you may use a prologue, or humans together who are here today. (D) This option is useful if you are struggling to cover the details of a character's past within the action of your novel. [substeps] However, many writers argue against using a prologue as a way to dump a whole bunch of backstory, or past information, on the reader.


Output: D