Detailed Instructions: 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".
Q: [header] How to gain fat [title] Visit the doctor. [step] Before making any kind of dietary or bodily changes, you should get a full evaluation from the doctor. If you have a preexisting condition like high blood pressure or high cholesterol, your doctor may advise against gaining weight. <sep> (A) Always take your doctor's advice seriously before making this kind of change. [substeps] Certain medical conditions will require you to keep your weight up. (B) The doctor might think that you're overweight or obese. This might result in the doctor recommending additional weight, which you should avoid. (C) [substeps] Overweight people may require additional tests to be evaluated to see how far that journey has progressed. Weight gain in childhood can be a clear sign of an adult developing an active, athletic lifestyle. (D) [substeps] If you've recently undergone surgery, you may be overweight. The doctor may suggest doing x-rays or assessing your height or being evaluated by an osteopath.
A:
A