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 clean rubber boots [title] Wipe away light dirt and grime. [step] If your boots aren't especially dirty, you can usually clean them easily with a damp cloth. To prevent dirtiness from building up on your boots and causing longer cleaning times, do this after each time you use your boots. <sep> (A) Before handling an object or stepping on something wet, make sure you wipe it away on a rag first. Use a mild soap and water to wipe off even the smallest traces of dirt. (B) [substeps] To increase the dirt fighting potential of your damp cloth, mix 1 tsp (5 ml) of dish soap with a ¼ gallon (1 l) of water. Douse your rag in this, and wipe down the boots. (C) [title] Grind three pounds (177 g) of dry powder on a coffee grinder. [step] The dry powder will help to transfer dirt and dust to the boots. (D) This will clear little dirt and grime off of your boots, leaving them looking brand new. [substeps] If your boots are already cleaned, you may need to consult a shoe store or partner to inspect them for a better cleaner.

Ex Output:
B


Ex Input:
[header] How to address guests on escort cards [title] Address individual guests using their full name. [step] Guests who are planning on showing up by themselves need only be identified by their first and last name. Consider including the person's middle initial if they have a common name that may be shared with other guests. <sep> (A) [substeps] Consider the sender of each card or the recipient's first and last name. If they have a primary or joint name, include this with the full name. (B) [substeps] It's a good idea to use the name of the guest you want to address yourself. For example, if you want a library card (and you have permission to use the card), you can designate it " mr. (C) [substeps] For example, someone who lives alone may want to include " treasurer jones, " especially if their name is john smith. [title] Use text messages to identify guests based on their name. (D) [substeps] Unless your wedding is going to be an informal celebration, don't use abbreviations or nicknames-write " samantha " instead of " sam " and " william " rather than " bill. " an escort card for an unaccompanied guest might simply read: " john b.

Ex Output:
D


Ex Input:
The girl rolls away from the camera in the chair to get a bottle of blue nail polish and hold it up to the screen. the girl <sep> (A) then begins to smoke a cigarette in front of the camera while talking. (B) then puts pink polish into the bottle and begins painting her nails holding them up to the screen. (C) puts the nail polish on a painted fingernail and paints it red. (D) begins painting the nail, while opposite the camera the girl is getting ready to paint with a red nail polish.

Ex Output:

A