C#.NET — Which statements about static methods are correct?

Introduction / Context:
Static members belong to the type itself rather than to any particular instance. Understanding how to call them and what they can access is a core C# concept.

Given Data / Assumptions:

• We distinguish invocation style and data access rules.
• We focus on standard C# semantics without unsafe tricks.

Concept / Approach:
Static methods are called on the type (for example, Math.Abs(…)), not on an instance. A static method cannot access instance fields or properties directly because it lacks a this reference. Static methods are defined within class (or struct) scope just like instance methods.

Step-by-Step Solution:

Verification / Alternative check:
Attempt to reference an instance field from a static method; the compiler flags an error due to missing instance context.

Why Other Options Are Wrong:

• A: Confuses static with instance invocation.
• B: Violates access rules for static versus instance context.
• C: Misstates the scope where static members live.

Common Pitfalls:
Creating an instance only to call a static method — unnecessary and misleading.

Final Answer:
Static functions are invoked using class.