What is the MOST useful piece of advice a scientist can follow in the field to prevent poisonous flora from damaging their lungs?

A. Don’t touch unknown fauna.
B. Wash your hands as soon as you leave the field.
C. Don’t expose your skin to or inhale the smoke of a burning plant.
D. Wear long sleeves, pants, and closed-toe shoes.

C. Don’t expose your skin to or inhale the smoke of a burning plant.