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 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.

Ex Output:
A

Ex Input:
Afterwards the woman takes the shaped dough and places it on a tray next to the stove. in the end <sep> (A) the woman puts the cake in a cookie sheet and puts it in the oven. (B) she pours several ingredients into syrup and begins baking the cookies. (C) the woman takes the tray and places it in front of her, she than instructs the girl to sprinkle the cookies. (D) , she takes out a mixer and grans the dough into a large, thick square for baking.

Ex Output:
C

Ex Input:
[header] How to tell if a tattoo is infected [title] Wait a few days before coming to any conclusions. [step] The day you get a tattoo, the entire area will be red, slightly swollen, and sensitive. New tattoos will be somewhat painful, about as sore as a severe sunburn. <sep> (A) If the tattoo is not infected, it will likely burn within the first six days. Simply return the tattoo to a reputable pharmacy and, if an attempt to remove it looks infected, take it to a physician. (B) This usually abates about 10 days after the tattoo, but you still may need to see your doctor. The following days will usually be the most likely day for the tattoo to appear infected : [substeps] The sun exposure is the most severe (this is usually around mid-morning or afternoon). (C) If you are concerned about your skin's perceived ability to heal or if you suspect something is seriously wrong, avoid handling the tattoo until that day. [substeps] Best to avoid touching your tattoo if it has already healed. (D) In the first 48 hours of getting a tattoo, it can be very difficult to determine whether or not an infection has set in, so don't jump the gun. Maintain a proper tattoo aftercare procedure and adopt a wait and see policy.

Ex Output:
D