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 treat your customer while serving them [title] When the customer approaches your till point, greet them nicely. [step] This means you should acknowledge the customer with eye contact. Say " hello " and smile. <sep> (A) [title] Apologise for any wait, no matter how short. [step] The customer might not understand why they have had to wait. (B) [substeps] Also greet them in a professional manner. Always state your name, address, and similar things. (C) Offer him or her a fresh drink once in awhile. [substeps] Remember to shake each customer's hand. (D) If you don't meet their smile they'll get bored and start saying no. To greet the customer again, do a brief " hi " and introduce them to your horde.
Example Output: A

Example Input: [header] How to choose a secondhand engagement ring [title] Visit a respected local jeweler. [step] Some jewelry stores carry a selection of secondhand or vintage engagement rings. Research local jewelers to find a trustworthy shop in your area. <sep> (A) Use the store's contacts to carefully inspect the rings and design design, but ask the jeweler if there are any indication that they intend to sell them. [title] Ask friends or family members who have similar ring engagement rings. (B) Alternately, ask your friend or family representative if they know of any reputable appraisers in their area. [substeps] Different shops will be exclusive, so ensure that the jeweler you seek matches your ring to that of your friend or family member. (C) [title] Look for a good price and type of ring you want. [step] Don't be picky when choosing online. (D) Consider how long the business has been open and ask friends or family if they are familiar with the business. A reputable jeweler will typically have an in-house gemologist and repair and resizing services.
Example Output: D

Example Input: [header] How to homeschool a blind or visually impaired child [title] Ensure you meet all legal requirements. [step] Before you begin homeschooling your child, you need to ensure that you are legally educating your child. Each state has different laws and regulations surrounding homeschooling. <sep> (A) In some states you may be required to apply for a permit to homeschool your child in the event you move or change your mind about home schooling. Some states require that adults and dependent adults attend homeschooling at least six years after successfully fulfilling your state's requirements. (B) Research your state's laws and make sure that you follow all guidelines carefully. [substeps] Laws will vary between countries, states, and even school districts, so you will need to conduct preliminary research before you get started. (C) [substeps] You will need to complete a pre-school agreement with the state department and then sign it. This agreement provides detailed guidelines and requirements regarding child care activities, such as how to provide food, clothing, and basic health care. (D) You need to determine what the requirements are for your state. [substeps] In most states, you must be able to secure funding before you can legally homeschool your child.
Example Output:
B