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]: [header] How to unblock a toilet when you have no plunger [title] Cover the end of a mop with a plastic bag. [step] Pull the bag over the end of the mop. Then, tie it off or secure it in place with a rubber band. <sep> (A) You can also use a rag or a toilet cloth to help secure the bag if you don't have a mop. [substeps] Try using empty containers to provide more protection. (B) After securing the handle of the mop, throw it away. [title] Turn on the water faucet. (C) [substeps] Discard any waste that falls from the end of the mop. [title] Use the bucket or bowl to catch any urine that spills out. (D) [title] Plunge your toilet with the mop. [step] Use a forceful in and out motion like you would with a normal plunger.
[A]: D


[Q]: [header] How to make iced green tea [title] Boil 4 cups (950 milliliters) of water in a large pot. [step] If you would like to make a single serving, boil 1 cup (240 milliliters) of water in a kettle instead and pour it into a mug. [title] Take the pot off the stove, and add 4 to 6 tea bags into the water. <sep> (A) [step] Swish the tea bag or bag around in the water to help dissolve it, then you're ready to serve it. [title] Add 4 to 6 teabags to the pot. (B) [step] The more tea bags you use, the stronger your tea will become. If you would like to make a single serving, dip 1 tea bag into your mug. (C) [step] Make sure that the tea bags reach the proper amount of length to minimize the risk of scorching. [title] Turn the heat off and let the tea steep for 10 to 15 minutes. (D) [step] This will have the texture of a teaspoon of ginger. [title] Leave it to steep for about half an hour.
[A]: B


[Q]: [header] How to make a poster with picture collage maker pro [title] Download picture collage maker pro and install on the desktop. [step] Then you can apply it into full play. [title] Adjusting page size and choose background. <sep> (A) [title] Make sure select a photograph or group of images as you put them next to frame. [title] Then go to add to frame and put collage creator pro down. (B) [step] Click the collage button of the top toolbar, you'll catch a glimpse of collage panel setting and background setup. Open the collage panel setting, you can resize the collage as you want, the width, height, predefined and orientation are waiting for you to adjust. (C) [step] Hide file on image or add pancontrols in status bar. The default background will add blur to collage maker in windows. (D) [step] Change the width of the background to 390 so it is bigger then the width of the poster frame. Then select photo default shortcut in program center] picture cover] frame.
[A]:
B