Question id 345 - Preflight Preparation - FAA PPL(A) - Private Pilot Airplane

Frost will disrupt the smooth flow of air over the wing, adversely affecting its lifting capability.
Frost will cause the airplane to become airborne with a higher angle of attack, decreasing the stall speed
Frost will change the camber of the wing, increasing its lifting capability

Training tests and timed exam simulations FAA PPL(A) - Private Pilot Airplane