Available options: (1). it can be seen. (2). major threat to health. (3). remains of prehistoric life. (4). competing for resources. (5). biological diversity. (6). it keeps an organism warm. (7). more abundant. (8). radiation-inducible.

You are presented with the quiz "Cancer genes are" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "cancer genes can be inherited" and "inherited mutations and inherited afflictions ARE radiation-inducible". So, what's the best answer to the question?
Answer:
(8).