In ABAP, how do you refer to a class method from an object reference?

To refer to a class method from an object reference in ABAP, the proper approach is to use the object reference followed by the arrow operator '->'. This syntax allows you to access instance methods and attributes of the class that the object reference points to.

When you have an instance of a class, represented by an object reference, you can invoke its methods directly with this syntax. ABAP's object-oriented programming structure emphasizes the relationship between objects and their classes, making it essential to utilize the object reference to access the specific methods tied to the instance.

The other options involve referencing class methods or constants incorrectly. Utilizing the class name followed by '->' would imply you're working with static methods rather than instance methods. Similarly, using '=>' is designated for class methods or static attributes rather than instance-specific ones linked to an object reference.