What will be the output of the following C# code snippet?

class static_out
{
    public static int x;
    public  static int y;
    public int add(int a, int b)
    {
        x = a + b;
        y = x + b;
        return 0;
    }
}    
class Program
{
    static void Main(string[] args)
    {
        static_out obj1 = new static_out();
        static_out obj2 = new static_out();   
        int a = 2;
        obj1.add(a, a + 1);
        obj2.add(5, a);
        Console.WriteLine(static_out.x + " " + static_out.y );     
        Console.ReadLine();
    }
}

A. 7 7

B. 6 6

C. 7 9

D. 9 7

Answer: Option C