Q: 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: If an antigen causes cancer, it is referred to as a pathogen., Question: What are antigens also? (A) resistance (B) negative (C) humans (D) positive (E) pathogens (F) more abundant (G) complex (H) Allergies
A:
E