public ICar MakeCar(CarOptions carOptions = null)
{
Car car = new Car();
car.SetPrice(carOptions?.Price == null ? 0 : carOptions.Price);
car.SetColor(String.IsNullOrEmpty(carOptions?.Color) ? "N/A" : carOptions.Color);
car.SetSafetyRating(carOptions?.SafetyRating == null ? 0 : carOptions.SafetyRating);
car.SetOptions(carOptions?.OtherOptions);
return(car);
}