The correct way to define a variable of type struct abc in the following C# code?

struct abc
{ 
    public string name;
    protected internal int age;
    private Single sal;
}

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