Which modifier should be used for a method that must not be overridden?a.finalb.publicc.abstractd.static

To determine which modifier should be used for a method that must not be overridden, let’s analyze the provided options:

1. final: This modifier is used to indicate that a method cannot be overridden by subclasses. When a method is declared as final, it essentially locks the implementation, preventing any subclass from redefining it.

2. public: This modifier specifies that the method can be accessed from any other class. It does not prevent overriding.

3. abstract: This modifier is used to declare a method that must be implemented by subclasses. It requires subclasses to provide an implementation, which is the opposite of what is needed if a method must not be overridden.

4. static: This modifier allows a method to be called without an instance of the class. While static methods cannot be overridden in the same way as instance methods, they can be hidden if a subclass defines a static method with the same name.

Conclusion

The correct modifier to use for a method that must not be overridden is a. final. This ensures that the method retains its implementation across any subclass and cannot be modified further.