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 get into a good secondary school in england [title] Prepare by learning about the schools. [step] Around september to october of the year before you hope to join the new school, you'll want to go to open evenings or open days. These are evenings where the school is opened especially for prospective students to visit the school and take a look around. <sep> (A) Attending these events will give you access to knowledge about the school, find out how to study there, and see what the schools do on the weekends. [title] Break into the traditional role of the school counsellor. (B) You should also prepare by gaining experience in a specific school. These skills can help convince your parents and friends that you fit into a good secondary school. (C) [substeps] The website of english schools in scotland is a good place to start. There are websites specifically dedicated to english secondary schools in scotland. (D) [title] Attend as many of the open evenings as you can. [step] Make sure you organise the dates and get to the evenings with plenty of time to look around-you don't want to be rushed.
Example Output: D

Example 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.
Example Output: A

Example Input: [header] How to grow phlox [title] Decide which phlox variety you want to grow. [step] All species of phlox produce flowers in a wide range of colors including white, pink, red, lavender and blue. Different varieties serve different needs in the garden. <sep> (A) Look online, in books and magazines for a list of your preferred phlox plants. [substeps] Be aware that phlox can produce fewer flower buds than other varieties, so there is no ideal number of phlox plants in your area. (B) Do some research to decide which one is right for your growing zone. Purchase potted phlox plants sold locally at garden centers or farmer's markets for transplanting any time during the growing season. (C) [substeps] Plants that need flowers include daisies, petunias, roses, poinsettia, redbells, ginseng, wisteria and daisies. Tree phlox grow in leafy bunches that grow from twigs. (D) [title] Pick your phlox planting spot. [step] Phlox grow and grow on a large long range of plants.
Example Output:
B