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 increase chest hair [title] Level out your testosterone. [step] Talk with your doctor about whether you have normal testosterone levels. Testosterone has a peculiar relationship to hair loss. <sep> (A) Not enough testosterone and your chest hair won't grow. Too much and it gets converted into dht, which shrinks hair follicles. (B) Polycystic ovary syndrome (pcos) is a genetic disorder that affects men and women. Pcos levels appear as a genetic problem. (C) Women with either bad hormones or difficulty maintaining a healthy body will have low levels of testosterone and can thin hair more quickly. Women with an untreated hair loss history or conditions found in hair loss will have low levels. (D) If you do not maintain your testosterone levels level even a little bit, it may be cause for concern to you. Your doctor can help you adjust to the changes.
A