An elderly woman complains of extreme weakness, shortness of breath, and a lot of nausea. These symptoms came on suddenly while she was grocery shopping and they continue. You find that she has no fever but she is diaphoretic. You tell the patient she should be transported to the ED. Your main concern with this patient is that she may be:
A. Having a heart attack.
B. Showing signs of a gastric ulcer.
C. Coming down with a contagious flu.
D. Showing signs of a bowel obstruction.