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 ombre paint a dresser [title] Decide upon a horizontal or vertical ombre effect. [step] Ombre painting simply means painting in a gradient, employing different shades of the same color to create the effect of fading. Before painting your dresser, decide if you want to create an ombre effect from top to bottom or from left to right. <sep> (A) [substeps] Horizontal ombre painting means painting up and down, crossing between shades of black and white to create a rainbow effect. Vertical ombre painting means painting one long, continuous shade of black to create a sun effect. (B) [substeps] Shaded shades are generally the brighter and fatter shades, while shades of metallic color may tend to lend the illusion of an ombre effect. [title] Lay your dresser on its side and extend it to the top. (C) [substeps] If your dresser has drawers stacked vertically, you can paint each drawer face a different color. This will make top-to-bottom ombre much easier. (D) In some cases, all you need to do is paint side and right for various shades. In other cases, though, you may only paint the outer edge of the dresser or have it to either to the right or left, depending on your model.

Ex Output:
C

Ex Input:
[header] How to be a safe teenage driver [title] Make sure to stick to the speed limit. [step] Even if you are running late somewhere, don't speed. It's better to get to your destination a few minutes later than planned than to be in an accident. <sep> (A) [substeps] If you can, use the designated speed limit as the number one way to stay safe. Say, " i'm going to slow down and stop at a crosswalk or change lanes. (B) [substeps] Always turn off your lights before you get to your destination. Check your vehicle for brake dust after each turn, as white brake dust can be far from safe. (C) Not only could speeding cause an accident, but it could result in you getting a speeding ticket! [title] Use common sense. [step] Wear your seat belt no matter what, and make sure not to get caught up in any distractions while driving, such as texting. (D) [title] If you know the shortest route to your destination, your first step is to stay calm and drive slowly. [step] There is no need to panic if you are in a secluded area so stop no more than you expect.

Ex Output:
C

Ex Input:
[header] How to troubleshoot mold on interior walls [title] Examine areas with excessive moisture. [step] Check your home for sources of excessive moisture. These include flooding, water leaks, damp basements, hvac duct systems or shower or cooking steam. <sep> (A) Flooding may also occur from unexpected dampness level changes. If you notice anything different in one area, it is a good idea to address it immediately. (B) Look for uninsulated exterior windows and walls, including uninsulated closets along exterior walls where mold can grow when you run your heating in the winter. [substeps] Check the airflow in your home. (C) [substeps] In addition to dampness, mold can also cause problems like condensation, mold overheating, and light fixtures unable to function properly. Read your contractor's policy on decluttered areas, and follow any policies regarding ambient moisture. (D) Before attempting to fix this problem, you should take out a damp air meter. It will help to know how long the mold has been there, how long it took to develop, and if anything else is going on.

Ex Output:
B