A patient complaining of a headache states that he fell and struck the back of his head. Which statement by the patient should be of most concern to the EMT?

A) "I lost my balance after stumbling on the rug."
B) "I take a blood thinner for my heart."
C) "I had a mini-stroke (TIA) five years ago."
D) "I had my appendix out two weeks ago."

B) "I take a blood thinner for my heart."