Answer: Stress can cause damage to the stomach by increasing the acid in the stomach, which results in indigestion.
Explanation: Hope this helps if not lemme know
It would be C because he's doing a healthy diet unlike the others
It's more accurate, especially since heart rate is almost universally measures in beats-per-minute, than, say, timing your pulse for a [factor of 60] seconds (30 seconds, 20 seconds, 15 seconds, 12 seconds, etc.).
