<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 24-year-old woman with a past medical history significant only for endometriosis presents to the outpatient clinic with a 2-cm left breast mass that she first identified 6 months earlier. On review of systems, the patient states that the mass is not painful and, by her estimation, has not significantly increased in size since she first noticed it. On physical examination, there is a palpable, round, rubbery, mobile mass approximately 2 cm in diameter. Given the lesions characteristics and the patients demographics, what is the most likely diagnosis?? A: Fibrocystic change, B: Fibroadenoma, C: Cystosarcoma phyllodes, D: Ductal carcinoma in situ, E: Invasive breast carcinoma,  <response>: Based on the information provided, this appears to be a question asking about the likely diagnosis for a breast mass in a young woman. The key details are that the patient is a 24-year-old woman with a 2cm left breast mass that she noticed 6 months ago. The mass is not painful, has not changed significantly in size, and on exam is round, rubbery, and mobile. Given the patients young age and the clinical characteristics of the mass, the most likely diagnosis is a benign tumor rather than a malignant one.B: Fibroadenoma 