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".

[header] How to post to a facebook group on pc or mac [title] Go to https: // www.facebook.com in a web browser. [step] You can use any web browser, such as chrome or safari, to access facebook. If you're not already signed in, sign in now. <sep> (A) [title] Click on the downward-facing arrow in the top right corner of the screen. [step] It's at the top-right corner of the screen. (B) [title] Click your profile picture at the top-right corner of the page. [step] You will see your profile picture in the upper-right corner of the page. (C) [title] Click a group to open the group's menu. [step] Click the group on the right sidebar, or the group's upper menu of options. (D) [substeps] You must already be a member of a group to post to it on your computer. See join groups on facebook to learn how to join a group.
D

[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.
B

[header] How to clean a charcoal grill [title] Locate a suitable area to clean your grill. [step] This area should be away from your campsite or off to the side of your yard. You'll be brushing ash and encrusted char off the grill at this location, so it should be far from walking paths. <sep> (A) Also use a special charcoal-flame cleaner. [substeps] Depending on the type of grill you use, you may choose a specific area. (B) [substeps] Choosing a cleaning location far from walking paths will prevent ash and char from being tracked around your campsite or home. [title] Brush dirtiness from the grate. (C) [title] Fill the grill with the fuel you'd like to use. [step] This should come from either live wood or a frozen burned wood, both of which are avoided by wood hobbyists. (D) The charcoal is flammable, so it may strike inanimate objects in the smoke area. [title] Spray or spray the briquettes with salt water.
B