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 buy a wood burning stove [title] Consider your heating needs by evaluating the size of your home. [step] You will need to determine the heat load necessary to maintain the square footage of the area you want heated. Heat load is measured in btus, or british thermal units. <sep> (A) Inquire about btus and thermal units using online resources. [substeps] Btus heat packs can be found at home improvement stores, department stores, and some gas stations. (B) To determine how much heat you need, pay attention to the dimensions of each room you intend to fire in. [substeps] The larger the square footage, the larger your fire seats will need to be. (C) You will need 25 to 30 btus per square foot. [substeps] Measure each room to be heated with measuring tape. (D) Btus are rated from 2000-1000. Btus can be changed or altered depending on the size of your home.
Example Output: C

Example Input: [header] How to whitewash trim [title] Set up your working area. [step] Cover the floor with a drop cloth to keep dust and whitewash off of it. Open screened windows and doors to provide ventilation. <sep> (A) Keep the temperature low to avoid fumes and keep your work area clean. Additionally, have at least one sheet of newspaper in case a lightning storm or other electrical emergency strikes strikes your home. (B) Set all of your supplies in a corner of the room so you know where everything is. [substeps] If you don't have a lot of experience painting, use painter's tape to tape off areas you don't want to get whitewash, like the walls. (C) [title] Consider using a small piece of velcro, preferably one in a similar color, to lock in moisture in the paneling. [step] For smaller boards, make sure to allow at least 24 hours for the patch to dry between applications. (D) You may also want to swing curtains over them for a soft and light cleaning that will come before whitewashing. There are online projects to do, or you can perform laser removal yourself.
Example Output: B

Example Input: [header] How to expunge a dui [title] Check if you qualify. [step] Several states, including new york and nevada, do not have expungement procedures. At most, they will allow a dui conviction to be sealed. <sep> (A) To make sure you are protected from expungement, visit your nearest law library or look at your local probate court's website. [substeps] Massachusetts, texas, and kansas are exceptions. (B) A sealed conviction, however, is not erased from your record and is still available for certain people to access. [substeps] Some states also refuse to expunge dui. (C) [substeps] The immigration and nationality enforcement agency (dcaa) also can seal dui convictions. If you are another half-true criminal, your efforts are limited, since the dcaa may not punish you again. (D) You will have to apply for an expungement if you are a dui. If you would not have been convicted of a dui while in prison, then expungement is not a good option for you.
Example Output:
B