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 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.

Ex Output:
A


Ex Input:
[header] How to entertain kids at your wedding [title] Designate a table for kids at the wedding. [step] If you are planning on having more than one or two kids at your wedding, create a table just for kids. This is an ideal option if the kids are all over the age of 5, as they can usually be on their own around other children without too much adult supervision. <sep> (A) When the table is full and the guests are ready to leave, designate a table for each child. This will make it easier for the guests to make changes to the table once the children arrive. (B) This would be ideal if they are all over the age of 7. [title] Design your table according to your guest's preferences. (C) Consider adding around two chairs, if you plan on having more than one, to fit a group of kids. [title] Choose food and drinks, if applicable. (D) Consider if the kids you are inviting to the wedding will be okay on their own without their parents at the same table. If so, a kids table may be the best option for keeping the kids in one place.

Ex Output:
D


Ex Input:
[header] How to create a template in microsoft word 2007 [title] Launch microsoft word 2007. [substeps] You can double-click on a desktop shortcut or locate it in the list of installed programs by clicking the start button on your windows desktop. Mac users can find word 2007 in the dock at the bottom of the desktop screen. <sep> (A) [title] Open a document that will function as the base for your template. [substeps] Click on the office button and select open from the menu. (B) [title] Wait for the program to successfully create a template. [step] The initial cursor icon will disappear and the program will display a workspace where you can place a template. (C) Simply right-click and select " microsoft word 2007. " [substeps] Depending on your operating system, you may need to open a new browser tab, then click the " home " tab at the top of the windows taskbar. (D) It may appear in the " start microsoft word 2007 " window. By default, desktop users must click on microsoft word 2010 to open it, often in a separate folder on desktop computers with windows xp units (os x pc).

Ex Output:

A