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 involve a dog in pet therapy work [title] Consider your dog's temperament. [step] The main requirement for a therapy dog is that they must be incredibly calm, emotionally secure, and comfortable around all types of people. If your dog is nervous, shy, aggressive, or has any other qualities that cause him to behave in standoffish or threatening ways around people, then he would not be a good fit for therapy work. <sep> (A) Decide what you will be doing with your dog before giving it time to develop socialization skills. [substeps] Common characteristics of a therapy dog include a poor attitude, lowered behavior, and aggression. (B) A therapy dog needs to be calm and comfortable when : [substeps] He is approached by or surrounded by many people (children or adults). He is roughly touched or hugged by someone. (C) [substeps] This is especially true if he is a tense, unpredictable, and impolite dog. [title] If your dog is at a loss for words, help him learn some helpful skills. (D) [substeps] Dogs with a history of trauma and anxiety are less likely to engage in therapy. Anxiety, fear, or mistrust issues can cause a good experience for a therapist with a pet.

Ex Output:
B


Ex Input:
[header] How to start salary negotiation [title] Look up salary information for similar positions. [step] Before you develop your own range, you should have a general idea of the going rate in the industry. [substeps] Make sure you have a full understanding of the particular job being offered, including the exact responsibilities and expectations for someone in that role. <sep> (A) You'll need to do a lot of research to ensure you understand the expectations of that job so you can easily look it up to the perfect employer. The rate for each individual position is its own set of guidelines, so the application process should take some time. (B) In addition to assessing your capabilities, you should also know what the salary market expects of you. This will take into account your level of experience in the industry, as well as the demand for that position. (C) That will help you evaluate what the position is worth in other firms. Different companies may call similar positions by different names, so if you don't have an understanding of the full job description you won't know which other jobs compare with the one you've been offered. (D) You also will want to get a good understanding of whether or not higher salary is required for similar positions as the one you are looking at. To determine whether or not the position is state-specific, research the company's new hire contract and check for various requirements such as the recipient's income.

Ex Output:
C


Ex Input:
[header] How to use ivermectin [title] Use ivermectin against certain worms. [step] Ivermectin is the drug of choice against several different kinds of worms. The two most common worms treated by this medication are strongyloides stercoralis and onchocerca volvulus. <sep> (A) [substeps] Strongyloides sterandrinds are considered normal doses for severe cases of parasites that might have been avoided with the medication. Onchopropyl methylcellulose is also an additive to this medication. (B) [substeps] Strongyloides stercoralis: this worm is prevalent in northern parts of the united states and canada. It is found on soil and prefers warm humid conditions. (C) [substeps] Strongyloides steroid drugs target the stomach lining-doing this provides minimal blockage, with the rotation of the worm and lowering serotonin, which therefore reduces the digestive process in the worm. [title] Learn about the other drugs that were shown to work. (D) [substeps] Strongyloides are those that are found within worms and then paste a barrier barrier to prevent the worm from entering their eggs. Strongyloides stercorindermoids are injected into the worm once every 12 to 36 months.

Ex Output:

B