What does the following C# code signify?

class a
{
 
 
 
}
class b : a
{
    variable declaration;
    method declaration;
}

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