The correct answer is A. Methods.
A method is a function that is associated with an object. It is a way for an object to interact with its environment. Methods can be used to get or set the value of an object’s attributes, to perform actions on the object, or to communicate with other objects.
An event is an occurrence that can be detected by an object. Events can be caused by user input, by the passage of time, or by other objects. When an event occurs, the object can respond to it by calling a method.
An instance is a specific example of an object. Each instance of an object has its own set of attributes and methods.
An attribute is a property of an object. It can be a number, a string, or a more complex object. Attributes can be used to store data about the object or to control the object’s behavior.