다음 코드의 실행 결과는?

class Animal
{
    public virtual void Sound()
    {
        Console.WriteLine("Animal sound");
    }
}

class Cat : Animal
{
    public override void Sound()
    {
        Console.WriteLine("Meow");
    }
}

class Program
{
    static void Main(string[] args)
    {
        Animal myAnimal = new Cat();
        myAnimal.Sound();
    }
}