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: A black object appears and the woman is now placing it onto a long pole, she's back on the ladder and she's using the black object to help her hold up the border wall paper as she applies it all along the wall. when the woman <sep> (A) finishes the wall paper is covered by a blue curtain and she begins to pull the white rod back and forth as she continues to use the soldering iron to create the wall paper. (B) has drawn a border on the wall, she stretches up to get a better hold, three inches above the floor leaving the wall covered in white paper. (C) is done plastering, she takes the phone back and the actual wall paper is now in place and it seems to be the perfect size, exact size and it has sparkles, three big black holes in it and it has the laminate look to make it look very clean. (D) is done the camera pans to show the finished job and the outro appears that includes the website, company name, price and phone number.
Example Output: D

Example Input: [header] How to calculate a light year [title] Define the light year. [step] A light year is a measure of distance equal to how far light travels in one earth year. Because distances across the universe are so large, astronomers use light years. <sep> (A) However, they can also be determined by dividing by a distance. [substeps] Some light years are used year-round. (B) For light year 2014, the main determiner is the sun. In the light year, the world is filled with light bulbs. (C) Without light years, discussing the distance between two stars would require the use of large, unruly numbers. [substeps] Another measure of distance you may come across when learning astronomy is the parsec. (D) [substeps] There are two kinds of light years: day and night. The two types of light years are known as night and day.
Example Output: C

Example Input: [header] How to wear black lipstick [title] Exfoliate and moisturize your lips. [step] Black lipstick starts to look streaky and flaky more quickly than other colors. To prevent this from happening, it's important to prep your lips before you apply it. <sep> (A) [substeps] Exfoliate for at least 15 minutes each. Follow up with a light moisturizer to replenish moisture. (B) Make sure you remove all skin flakes and moisturize your lips so they're soft and supple. If your lips are chapped, you might want to save the black lipstick for another time. (C) To do this : [substeps] Apply your moisturizer. Read the package to see how long it will take to dry up. (D) Take a piece of cotton print paper and lay it across your lips, brushing out the surface until you've created perfect lines on your lips. [substeps] When you seal your lips around the paper, you'll have a kind of " canvas " over your lips.
Example Output:
B