A 40-year-old, blond, blue-eyed woman has found an irregular, brown-pigmented lesion on her shoulder. She admits enjoying the sun and outdoor activities. A biopsy shows the lesion is malignant.
What is the embryonic origin of the cells that gave rise to this malignancy?

A. neural crest
B. dermatomal mesoderm
C. ectoderm
D. intermediate mesoderm
E. lateral mesoderm