Select the items which help avoid naming conflicts. The "this" keyword allows us to avoid naming conflicts within a class Child classes help avoid naming conflicts with methods because any method named in the parent must be overriden if a method of the same name (same signature) is defined in the child class. If a variable has the same name as its parent class, it will be used by default and we can use super() to access the parents variable. Packages help avoid naming conflicts because if two Classes, methods, or variables are the same we can use the full package signature to specify which we want. Sub classes help avoid naming conflicts because if you name a variable the same as its parent it makes it so you cannot access the parent.