You will be given a definition of a task first, then some input of the task.
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 get used to dogs [title] Figure out the root of your fear. [step] There are a variety of reasons people may be apprehensive around dogs. The first step to overcoming your fear is identifying potential sources. <sep> (A) Think about the different forms of fear you associate with dogs. [substeps] For example, you may fear dogs because you are worried about your health. (B) This can help you see where and how a fear is based in irrational thinking. [substeps] Oftentimes, people fear dogs because their parents instilled a fear in them at a very young age by overreacting in the presence of a large, unfamiliar, or overactive dog. (C) Talk to a veterinarian about your fears. Ask them what the most important things at all about a dog are. (D) The most common source might be the result of multiple different things, such as hormones or emotional factors. Other times, environmental factors may exacerbate fears.
Output:
B