Depends on what you mean by cold.
If you mean like cold, like tempurature, then wear the smallest amount of cloths, and use air conditioning.
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.
The third one. hope this clarifies
D because if you have already tried one treatment and it caused a infection you would need to change it
