In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").

Fact1: Antigens are found on cancer cells and the cells of transplanted organs., Fact2: Antibodies bound to antigen are then measured by RCAT-based amplification of the associated DNA tag., Question: Where can cells bound by antibodies more likely be found? (A) critical organs (B) colder and wetter (C) the environment (D) Earth orbiting the Sun (E) Veins and arteries. (F) epidermis and dermis (G) on cancer cells (H) the skin
G