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 make simple five minute frosting [title] Beat the butter in a medium-sized mixing bowl until smooth and fluffy. [step] You can use an electric mixer or a food processor. [title] Add the powdered sugar a small amount at a time. <sep> (A) [step] Use the stand mixer to mix the ingredients on medium speed until smooth and sugar dissolves. Add the vanilla, milk, and eggs. (B) [step] It will increase the strength of the frosting gradually. [title] Once 1 teaspoons of powdered sugar is added, whip the butter. (C) [step] The mixture will appear dry and crumbly at first, but it will become smoother. [title] Gradually stir in the half-and-half or milk until you have reached your desired consistency. (D) [step] The more powdered sugar the healthier the frosting is. [title] Add the vitamin e oil, and stir to combine.

Ex Output:
C

Ex Input:
[header] How to pack clothes for moving [title] Lay out and sort your clothes. [step] Often times over the years clothes can become piled up without you even realizing it. The first step to sort this all out is to get all of your clothes out from your dresser, closet, attic, and below your bed. <sep> (A) Divide this small packing task into smaller tasks, like carrying some sheets or tossing off the rest. That way, you have all of the steps to get everything packed well and comfortably. (B) This ensures that you have all the clothing you need until the day of the move. [title] Keep your clothes with you at all times. (C) Get everything sorted based on what has happened while you were on the move. [substeps] For example, say you moved in from college and you have all of your clothes in your new dorm space. (D) Lay everything out, either across your floor, or on top of your bed. Begin to pair things together, based on color, size, and fabric.

Ex Output:
D

Ex Input:
[header] How to choose a piano [title] Make sure you want a piano and not a digital keyboard. [step] Nothing quite beats the sound of an authentic piano, but many digital keyboards can replicate the sound of a piano, as well as mimic other instruments. They are also lighter and cheaper. <sep> (A) [substeps] A music keyboard is a device that most piano players use to play a musical instrument. There are usually keys protruding out of the keyboard, and macs have no equalizer. (B) Large keys build up vibration and are also uncomfortable to play on a digital keyboard. [title] Think about how big you want your piano to be. (C) [substeps] Digital keyboards are one of the most expensive things on the market, so get a beginner's keyboard from a store like macy's. [title] Determine how much sound you want to get. (D) [title] Figure out what size and sound you want in a piano. [step] Size matters when it comes to pianos.

Ex Output:
D