What advice should an ACE certified Personal Trainer give to outdoor boot camp participants in order to remain safe as the temperatures decrease and wind chills Increase?

What advice should an ACE certified Personal Trainer give to outdoor boot camp participants in order to remain safe as the temperatures decrease and wind chills Increase?
A . Keep the head covered, choose clothing that blocks the wind and reduce fluid Intake.
B . Wear clothing made of cotton, allow for adequate ventilation of sweat, and reduce fluid intake.
C . Wear several layers of clothing, allow for adequate ventilation of sweat, and drink plenty of water.
D . Wear several layers of clothing, avoid synthetic materials, and drink ample amounts of warm fluids.

Answer: D