The most common cause for the check cells not reacting is

You are demonstrating boot removal to a class of OEC candidates. While explaining Rescuer #1's role, you indicate that his first task is to:

a. unbuckle or unlace the boot. b. check the patient's CMS. c. stabilize the patient's leg and ankle. d. remove the boot.

Your patient is a 79-year-old man who fell down and cut his leg. Blood is running freely from the cut, but the patient says he fine and starts to try to stand up. Because of ________, you should suspect that his injuries may be worse than usual for this type of event.

A. his age B. his gender C. the nature of the illness D. the mechanism of injury