Problem: A 1-month-old girl presents for a routine exam. The examination findings were unremarkable except for three medium-brown macular lesions on the upper back and the right side of the chest. The lesions appear to have smooth edges and range in size from 0.2 to 0.5 cm in diameter. Suspects:
A - neurofibromatosis.
B - café au lait spots.
C - Mongolian spots.
D - melanoma.