Is Frost Considered Hazardous to Flight

Multiple Choice

is frost considered hazardous to flight?

A) Frost disrupts the smooth flow of wind over the wing causing reduced lift.
B) It increases the weight of the aircraft and changes the weight and balance.
C) Frost changes the basic aerodynamics of the airfoil, thereby causing reduced lift.
D) There is no hazard only ice on the wings cause a hazard.