Which Statement by a Patient Who Was Recently Diagnosed with Cancer

Which statement by a patient who was recently diagnosed with cancer indicates an understanding of the pathogenesis of cancer?

A) "My cancer is probably caused by a disorder of my immune system."
B) "My cancer is probably caused by a disorder of my endocrine system."
C) "My cancer is probably caused by a disorder on my gastrointestinal system."
D) "My cancer is probably caused by a disorder in my hematological system."