Which C# statement should be added in function a() of class y to get output "i love csharp"?

class x
{
    public void a()
    {
        console.write("bye");
    }
}
class y : x
{
    public void a()
    {
    /* add statement here */
        console.writeline("  i love csharp ");
    }
}
class program
{
    static void main(string[] args)
    {
        y obj =  new obj();
        obj.a();
    }
}

A. x.a();

B. a();

C. base.a();

D. x::a();

Answer: Option C