Choose the correct way to apply a WebService attribute to a class in C# (considering named parameters for Name and Description).

Introduction / Context:
Attributes in C# use square brackets and named arguments with the equals sign. This question contrasts correct C# syntax with VB-like syntax or invalid named argument tokens.

Given Data / Assumptions:

• We want to apply a WebService attribute to a class.
• We are writing C#, not VB.NET.

Concept / Approach:
In C#, attributes are written as [AttributeName(arg1, NamedProperty = value, ...)] preceding the declaration. Inheritance is expressed with a colon (:) and the base type name. VB.NET uses angle brackets and different keywords (Inherits) and named argument syntax (:=).

Step-by-Step Solution:

Verification / Alternative check:
Paste Option A into a C# project with the appropriate using directives (System.Web.Services) and it compiles. Others will not compile in C#.

Why Other Options Are Wrong:
They either use the wrong language syntax (VB.NET/Java) or invalid tokens for C# named arguments.

Common Pitfalls:
Copying snippets between languages without adjusting syntax; confusing attribute positional parameters with named properties.

Final Answer:
[WebService(Name = 'CuriousTab', Description = 'CURIOUSTAB WebService')]\nclass AuthenticationService : WebService { / ... */ }