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". 

Ex Input:
[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.

Ex Output:
C


Ex Input:
The man is hunched over on the the ground trying to build a fire by himself. It's all about adding oxygen at the right time once you have started a nice fire. also <sep> (A) , the cameraman goes to stand up to help the guy who's in the crouch position as the camera guy films them and makes notes. (B) , the guy rushes to get a bigger one. (C) , the man is not lying flat on the ground as he is trying to put firewood into the fire on the ground. (D) , if the fire is dead or dying you just hit it with a little bit more oxygen and it will help bring it back up.

Ex Output:
D


Ex Input:
[header] How to use leftover roast [title] Make beef broth. [step] You can make a rich beef broth to have on its own or use the broth as a base for soups and stews. To make the broth, just saute large pieces of the leftover roast beef along with one diced onion. <sep> (A) [substeps] Heat the beef broth in a slow cooker, or just put the onions in with it. Cook the beef broth in the slow cooker for four hours, stirring constantly. (B) Make sure you submerge the beef pieces in a quart of water to make the broth. Leave the meat in the broth for at least one hour and then take it out, rinse, and dry with a small amount of water and store it. (C) Once the onion is soft, add enough water to cover the meat. Bring this to a light boil and keep cooking until the water darkens. (D) Allow the beef broth to cook on low heat. [substeps] You can substitute sherry vinegar if you'd prefer a sweeter flavor.

Ex Output:

C


