On a Rainy Day the Maximum Frictional Force Between a Car's

Multiple Choice

On a rainy day the maximum frictional force between a car's tires and a certain level road surface is reduced to half its usual value. The maximum safe speed for rounding a curve is

A) unchanged.
B) reduced to 25% of its usual value.
C) reduced to 50% of its usual value.
D) reduced to 71% of its usual value.