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 a plastic water tank [title] Open the outlet valve or tap. [step] The first step to cleaning your tank is to empty all of the water from it. To do so, open the outlet valve or tap at the bottom of your tank and let all of the water flow out. <sep> (A) [substeps] You may find that there's extra water in your tank that you need to empty. Read the instructions carefully to see if your water is full enough to remove. (B) You will have to remove several pieces of tank flooring to access one. For the best results, take the steps above. (C) Then, use a bucket to wipe the water down away from the water line, then gently empty the tank contents into the toilet. [substeps] You should also clean the water tank once every few months to keep it clean. (D) [substeps] Connect a hose to the open valve in order to direct the water to a location where it will not cause any localized flooding or erosion. Permanent water tanks have a washout valve that is located at the base of the tank.

Output: D

Input: Consider Input: [header] How to catch lake trout [title] Use a light-action rod with 4 to 6 pound test line. [step] This is the best rod to use for trout fishing and allows you to use a variety of techniques to catch your trout. The lighter line has less friction with the water, allowing you cast your line to the very bottom of the lake with ease. <sep> (A) All you have to do is lightly tap the rod with your finger to get some water onto the rod. [title] Get your hand used to the catch. (B) The slower you cast the rod, the more power your line will have. [substeps] Be aware that certain fishermen only use lighter lines when they plan on doing something else. (C) [substeps] Some lake trout can be over 35 pounds, you will need a heavier rod for these. If you know you're fishing a lake that has massive fish, bring a heavier rod as well. (D) [substeps] Watch out for small rocks in the water if you're unsure how to cast your line. The rocks reflect off of lake trout very easily.

Output: C

Input: Consider Input: The credits of the clip are shown. People kick a ball indoor between yellow cones on fake grass. a player <sep> (A) spins a ball under the yellow cones. (B) passes to a net on the side. (C) kicks the ball out of bounds for a goal. (D) kicks a ball over a guy's head.
Output: D