Stress can effact youu digestive system by causing your esophagus to go into spasms. Increasing the acid in your stomach, which results in indigestion, making you feel nauseous.
C. A 50% oxygen saturation level of blood returning to the lungs might indicate an activity level higher than normal.
Tell the person stop driving, find someone else to drive or you dive yourself
C or maybe D well it depends if it is professionally or not
