What will be the Correct statement in the following C# code?

interface a1
{
    void f1();
    void f2();
}
class a :a1
{ 
    private int i;
    void a1.f1()
    {
    }
 }

A. A blueprint for creating objects B. A method in C# C. A variable in C# D. A data type in C#

A. create B. instance C. object D. new

A. A method in C# B. A variable in C# C. An instance of a class D. A data type in C#

A. public B. private C. protected D. internal