70. A 36-year-old woman has noted a nodule beneath the skin in her left groin since adolescence. On physical examination, the lesion has a 2-cm diameter and is nontender, soft, rubbery, and movable. Which of the following cell types is most likely to comprise this lesion? A. Adipocyte B. Endothelial cell C. Fibroblast D. Skeletal muscle E. Smooth muscle