Question: What is an instance method?

1. Instance methods can modify the state of an instance or the state of its parent class.
2. Instance methods hold data related to the instance.
3. An instance method is any class method that doesn't take any arguments.
4. An instance method is a regular function that belongs to a class, but it must return `None`.

Answer: The correct answer of the above question is Option A:Instance methods can modify the state of an instance or the state of its parent class.