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". 

Input: Consider Input: [header] How to clean rubber boots [title] Wipe away light dirt and grime. [step] If your boots aren't especially dirty, you can usually clean them easily with a damp cloth. To prevent dirtiness from building up on your boots and causing longer cleaning times, do this after each time you use your boots. <sep> (A) Before handling an object or stepping on something wet, make sure you wipe it away on a rag first. Use a mild soap and water to wipe off even the smallest traces of dirt. (B) [substeps] To increase the dirt fighting potential of your damp cloth, mix 1 tsp (5 ml) of dish soap with a ¼ gallon (1 l) of water. Douse your rag in this, and wipe down the boots. (C) [title] Grind three pounds (177 g) of dry powder on a coffee grinder. [step] The dry powder will help to transfer dirt and dust to the boots. (D) This will clear little dirt and grime off of your boots, leaving them looking brand new. [substeps] If your boots are already cleaned, you may need to consult a shoe store or partner to inspect them for a better cleaner.

Output: B


Input: Consider Input: A man is talking on a basketball court. he <sep> (A) picks up a bottle of water and takes a drink of the water. (B) shows how to play the volleyball. (C) then demonstrates how to throw a ball to the goal. (D) starts hit by the ball.

Output: A


Input: Consider Input: [header] How to disable a garage door sensor [title] Ensure that the door is closed, if possible. [step] Engaging manual mode on your garage door while it's open may cause it to come crashing closed if the door spring is damaged. Avoid this by setting it to manual mode while the door is closed. <sep> (A) [substeps] The manual mode setting should be set to " off " or " auto " as opposed to " on. " [title] Determine if you can shut off your car's garage door. (B) [substeps] Reverse all irrelevant changes that would result in the door spring finally shutting after using manual mode when the garage door is shut. Because the door spring latch is a key feature of garage doors, none should be tampered with, regardless of whether the door spring is unlocked or not. (C) [substeps] If you have to disable manual mode on the garage door, it will be turned on manually. If you're worried about it tottering open, this is an option that you can use when you unlock the door to find the door moving. (D) [substeps] If this is impossible because the door is stuck open, move on to the next step. [title] Prop the door up with 2x4s if it's stuck open.


Output: D


