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 put music on facebook [title] Navigate to the website that features the music you want shared. [step] Examples of such websites are youtube and soundcloud. [title] Click on the " share " button located next to the music selection you want shared. <sep> (A) [step] You will be redirected to a page explaining to you exactly what music you want shared, and the category where it can be shared. [title] Click on " share " located below " share " in the drop-down menu. (B) [step] If you have multiple fans or listeners, you may see a link in the sidebar that says, " add a facebook friend to your friends list ". Click it if you want to add a facebook friend in the list. (C) [title] Scroll down until you see the right size. [step] If you are looking for music that is already on facebook, such as songs from a specific artist and/or a series of popular music videos, you will see the appropriate size. (D) [title] Select the option for facebook when asked how you want to share your selection. [title] Enter your facebook login information at the prompt.
D

[header] How to start a taxi company [title] Investigate whether there's a need for a taxi company in your area. [step] In smaller towns, the demand for taxis usually isn't so high, so considering a different location to start a taxi company might be a wise choice. [title] Determine your niche. <sep> (A) [step] What is the ideal type of taxi company or whether the need is a strong job market. However, there's also a reason you could (and probably should) start a taxi company for a fee. (B) [step] Taxi companies and vegans have a pressing concern in their treatment for foreigners in countries. Decide what you wish to be used for based on your niche and behaviors when applying for a taxi company. (C) [step] Though most taxi companies cater to all types of customers, there are those that cater to high-end clientele such as politicians, diplomats, and executives. Other taxi companies offer adapted vehicles for the physically impaired, while yet others provide green taxis for environmentally-conscious customers. (D) [step] To start a taxi company, you will first need to determine your own niche, and how much money you're willing to spend on the service. This is where you'll be able to make the hiring process go more smoothly.
C

[header] How to make brownies in a mug [title] Use a clean, ceramic, microwave-safe mug. [step] It shouldn't have any metal on it. In general, a simple, unadorned ceramic mug is going to work the best. <sep> (A) [title] Pour the brownie batter into the mug. [step] Do this a few times while you're waiting for your brownies to rise on top. (B) [substeps] Scoop a good amount of the batter into the mug. If you try to use the mug from the bottom and the bottom of the mug did not fill it up yet, you won't be able to fill it up fully and get the brownies moist. (C) [title] Mix up the 1/4 cups flour/sugar, and 2 tablespoons cocoa in a mug. [step] Take the dry ingredients and blend them up well. (D) [title] Cut the round, hollow side out of the mug. [step] Use a sharp kitchen knife or kitchen spatula to carefully cut the round, hollow side down.

C