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". 

[header] How to make modeling clay in a slow cooker [title] Preheat the slow cooker. [step] To ready your slow cooker for cooking the clay, it's important to preheat it. Plug it in, and set the temperature to low. <sep> (A) That will allow the slow cooker to heat up slowly. [substeps] While children can help with the measuring and mixing of the ingredients, an adult should handle preparing and heating the slow cooker. (B) Cover the slow cooker and leave it somewhere out of the way where it won't be disturbed as it cooks. Doing this early will make your clay easy to mix and smooth. (C) Avoid getting hot coals inside the slow cooker. [substeps] Make sure there are no ashes or scraps of food stuck onto the bottom of the slow cooker before cooking the clay. (D) Allow the slow cooker to heat up to about 325 degrees fahrenheit (260 degrees celsius) for 1 hour. [substeps] Do not allow the temperature to go above the cool bar when you shut the electric slow cooker.
A

[header] How to defrost bread [title] Thaw out as many slices as you'll need. [step] If you're only going to use a portion of your sliced bread, it's best to defrost that portion only. Thawing out an entire loaf of sliced bread when you only need a few slices will require you to either consume the rest of the loaf or refreeze it. <sep> (A) [substeps] Refreezing bread repeatedly can dry the bread out, making it hard and/or stale. Set aside as many slices as you'll need to defrost and save the rest in the freezer. (B) It shouldn't take more than 1 hour. [title] Squeeze from a plastic bag if you don't have a plastic bag. (C) [substeps] This method works best with a large amount of bread. Defrosted loaves may tear, which can cause it to cook unevenly. (D) [substeps] Thawing out or leaving the bread cold won't help defrost the bread. It only makes it smell bad when it's ready.
A

[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.

D