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".

[Q]: A woman cleans a cafeteria floor with a mop while occasionally talking to the camera. the woman <sep> (A) uses a mop on the floor under her chair and in a bucket. (B) uses the mop around the tables and some seating areas as well as around fork corners. (C) uses a mop nozzle to clean the floor. (D) walks to and cleans a different part of the cafeteria floor.
[A]: D

[Q]: [header] How to take care of butterflies [title] Start with baby caterpillars. [step] If this is your first time raising caterpillars, you might want to start with a caterpillar kit. You can order a kit online and choose from a variety of butterfly species. <sep> (A) You can store all your butterflies at once in the kit. Just make sure not to overpack them in 1 location. (B) [substeps] Choose a caterpillar you'll be able to collect for some extra protection. You don't want a caterpillar whose wings are incredibly weak. (C) Make sure that the caterpillar is about 3 feet (0.6 m) in length. [substeps] If it is not small enough, you will have to wait several hours before you begin the process. (D) The kit will come with everything you need to raise the caterpillars into butterflies. If you prefer, you can instead find caterpillars in your neighborhood and provide what they need to become healthy butterflies.
[A]: D

[Q]: [header] How to maintain your kitchen knife [title] Always cut on a cutting board. [step] Using marble, granite, or any other solid surface is too hard and unyielding for a kitchen knife. This can dull your knife much more quickly. <sep> (A) [substeps] Choose a wooden cutting board instead of one made of plastic or any hard, solid material, such as glass. [title] Sharpen and hone your knife regularly. (B) You will need to use a sharp cutting board that is 3 to 4 feet (1.8 to 3.2 m) in diameter to cut. Marble is also particularly sensitive to pressure and is prone to rust. (C) [title] Sharpen your knives using a spare set of knives. [step] These knives have rounded sides that are meant to make the blade sharper. (D) To prevent damage to the knife, never apply pressure to the handle. [title] Make a point of removing all fat and weed from the blade.
[A]:
A