Which of these patients is probably in stage IIIC?

A. A tumor of any size that has spread to lymph nodes behind the breastbone and under the arm.

B. A tumor that has grown into the skin of the breast, which might cause swelling and lumps in the skin

C. A tumor 5 cm or less that has spread to 3 lymph nodes

D. A tumor 2 cm or less that has spread to underarm lymph nodes