The flashes I saw were right in front of my eyes , not way over to the right . The flashes I saw , I knew , had been in my head .
According to the above context, choose the best option to answer the following question.
Question: What caused the flashes ?
Options:
A. None of the above choices .
B. There are gunshots
C. There are fireworks
D. There is a mental illness causing hallucinations


D