What is a method in object-oriented programming?

In object-oriented programming, a method is specifically defined as a function that is associated with an object and allows that object to perform actions or behaviors. Each method is a block of code that can carry out a specific task, and they often manipulate the data contained within the object or perform operations related to that object. Methods are fundamental to the principles of encapsulation and abstraction in object-oriented design, as they provide a way to interact with the object's properties and manage the functionalities of the object.

While class variables and properties contribute to an object's state, and commands that execute scripts may pertain to broader programming concepts, they do not define what a method is in the context of object-oriented programming. Methods are distinct in their role of enabling objects to execute behaviors, thus making option A the correct and most relevant choice.