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 small boy wearing a black and red striped shirt <sep> (A) performs flips and hand springs on a grassy field with a wild animal. (B) grabs a scooped ice cream scoop and scoops out all the melted ice cream. (C) hits a beer pong table in a dimly lit room. (D) is sitting with a drum set and playing drums.
Example Output: D

Example Input: [header] How to clean a vornado fan [title] Clean out dust in the outer grills using a vacuum cleaner brush. [step] You can use a brush attachment on a vacuum cleaner to clean out all of the dust from the outer grills. Make sure the fan is unplugged before vacuuming. <sep> (A) [title] Place a cleaning rod in each section of the fan and squirt some cleaning fluid through each rod. [step] Avoid getting any grease in the vents or rest tray. (B) Some of the cleaner should be removed from the outside if you use a cloth and brush as cleaning instructions are laid out in the manual. [substeps] Avoid cleaning the outer grills with dust because it can detach some of the insulation and contribute to the fan's cooling. (C) Wipe down the inside of the cover every few minutes so you can put the fan back together. [substeps] For maximum efficiency, you should wash your vornado fan at least once a month, which is right after each dry run. (D) Go slowly when vacuuming to ensure you clean out as much dust as possible. [substeps] This will only clean the outer part of the fan, not the inside blades.
Example Output: D

Example Input: [header] How to clean plastic containers [title] Remove the lid from the container. [step] After you pop it open, check to make sure there are no remnants of food left inside. Give the container a quick preliminary rinse with hot water. <sep> (A) Then, pour boiling water into the container to rinse it thoroughly. [substeps] If you are cleaning small containers, this is a good time to simply squeeze out the dried or yucky food inside. (B) If your container does have any raw food in it, wash it off with hot water and a clean rag. [title] Dump all food out of the container into a bowl and rinse it thoroughly. (C) Drain and shake out the excess water and place the container on the kitchen counter. [substeps] If there's any dried or sticky residue inside the container, it may help to wipe it out with a paper towel before you begin cleaning. (D) [substeps] Once it's clean, shake it to check for any remaining traces of food or debris, then spray the container down with a solution of household disinfectant. [title] Dump the container in a storm-proof bucket to drain out any leftover liquid.
Example Output:
C