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 treat tumors [title] See your doctor if you find a tumor or experience unusual symptoms. [step] Schedule an appointment as soon as you notice an unusual lump, growth, or changes in a body part's texture, size, or shape. Many people don't have any other symptoms, but you might experience pain, weight gain or loss, weakness, or changes in appetite. <sep> (A) [title] Examine your body for lumps or changes in skin color. [step] In order to diagnose tumors and changes in skin colour, you will have to examine your body for lumps and changes in texture or color of your body. (B) Seek medical attention as soon as possible if you find a lump, pattern, or abnormality. [substeps] As with tumors, tumor growth can make a person susceptible to cancer. (C) [substeps] These symptoms could be due to a variety of causes, and an unusual lump could be a cyst, fatty deposit, enlarged lymph node, or inflammation. Your doctor will need to perform tests to make an accurate diagnosis. (D) The tumor can become larger in size, spread out, or produce larger recs, enlarged lumps, painful bumps, or changes in the texture. [substeps] Tumors can develop around the surface and cause infection.
Output:
C