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 not let acne get you down [title] See a dermatologist. [step] This is an important first step. In many cases, acne is curable when treated properly. <sep> (A) You can see a dermatologist by asking him or her some important questions about your underlying issues. Be sure to mention this before you start testing your acne with the doctor, as your doctor may want to do additional tests for you. (B) However, it can affect several factors: age: people can develop acne within one decade of age. Due to conditions which develop very suddenly, it is important to see a dermatologist. (C) Dermatologists specialize in treating skin conditions. A recommendation from your doctor will take the guesswork out of trying to treat your acne. (D) But you should always see a dermatologist if acne is something you cannot control, especially if it's a flat, basic problem. It's important to know the severity of acne and what treatment will benefit you and your cause (s) in future life.
Output:
C