(c) Is same for both cars.Given: both the cars have same initial speed.Let the masses of the two cars be m1​ and m2​.Frictional force on car with mass m1​=μm1​ g So, the deceleration due to frictional force =m1​μm1​g​=μg Frictional force on car with mass m2​=μm2​ g So, the deceleration due to frictional force =m2​μm2​ g​=μg As both the acceleration are same, from the second equation of motion s=ut+21​at2 Thus, we can say that both the cars have same minimum stopping distance