2 A 35-year-old healthy woman had a firm nodule of the uterus six years ago recorded on routine physical examination. The nodule has slowly increased in size and now appears to be about twice the size it was when first discovered. By ultrasound ?scan it is solid and circumscribed. She remains asymptomatic. Which of the following neoplasms is she most likely to have A. Leiomyoma B. Melanoma C. Leukemia D. Hydatidiform mole