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 numb a tooth [title] Take an over-the-counter-painkiller. [step] A painkiller like ibuprofen or acetaminophen should be your first step in trying to numb a painful tooth. These painkillers will alleviate the pain from your tooth, and should also decrease any swelling in the infected area. <sep> (A) [substeps] If you are not able to find ibuprofen, you can opt for acetaminophen instead. [title] Freeze food that contains aspirin. (B) [substeps] Ibuprofen can be applied within 30 minutes to up the duration of an over-the-counter painkiller. Follow the manufacturer's instructions and do not take ibuprofen within 30 minutes after it has been applied. (C) [substeps] Make sure you read and follow the dosage on the packaging. Do not eat anything until told to do so by your dentist to ensure you are following the proper dosage. (D) These are all readily available at your local pharmacy. [substeps] If you're treating a toothache in a child younger than 18, do not give him or her aspirin.

Ex Output:
D


Ex Input:
[header] How to make vegan egg drop soup [title] Heat the soy milk in a saucepan to 180 ° f (80 ° c), measuring the temperature with a soup thermometer. [step] Stir the milk constantly with a wooden spoon to prevent scorching. [title] Combine the epsom salt and the boiling water, stirring well to combine. <sep> (A) [step] This creates the coagulant that will separate the soy milk into curds and whey. [title] Pour half of the coagulant into the soy milk and stir it once. (B) [step] Reduce the heat to low and allow the mixture to simmer for 5 to 7 minutes. Then remove the pan from the heat and wait for your soup to cool to room temperature. (C) [title] Combine the banana peels, peeled and dried-peas, and ginger together. [step] Pour this mixture into the saucepan and bring this water to a boil on medium-high heat. (D) [step] Make sure that you're heating the water and addition space before you begin. [substeps] Epsom salt can be purchased at very low prices at food supply stores.

Ex Output:
A


Ex Input:
[header] How to improve your health with coconut water [title] Improve your nutrition and your health. [step] Good nutrition and good health go hand in hand. You can get vital nutrients like potassium, magnesium, and manganese from coconut water, and improve your health in the process. <sep> (A) [substeps] Be sure to eat enough while drinking coconut water to keep you nourished and healthy. Two to three servings of coconut water per day is typically sufficient for a healthy woman. (B) Coconut water is naturally low in fat, and it is a good source of potassium, magnesium, and manganese. [substeps] Potassium is an electrolyte that is responsible for muscle contraction, which is important for heart health and good digestion. (C) Keep in mind coconut water is full of these nutrients, meaning you need a good source of vitamins to maintain your health, including calcium, magnesium, manganese, and protein. The last thing you need is to drink coconut water all day because it can make you bloated. (D) [title] Drink eight 8 ounce glasses of coconut water daily. [step] Coconut water is delicious, and it contains both beneficial minerals and antioxidants.

Ex Output:

B