Which of the following statements is true for built-in exceptions?

A built-in exception can be explicitly raised in the code using a 'raise' statement, making it possible to trigger the exception intentionally based on certain conditions. This is particularly useful for creating more controlled error handling within your programs. For instance, if a value does not meet certain criteria, you can raise a specific built-in exception like ValueError to indicate that an error has occurred. This explicit raising allows developers to create functionalities that can respond dynamically to unusual situations or errors that may arise during runtime.

While other statements may contain elements of truth, they do not accurately describe how built-in exceptions function in Python. Not all code that could potentially raise an exception must include an 'except' clause. Similarly, while built-in exceptions are predefined in Python, they can indeed be raised by developers through the 'raise' statement, contrary to the assertion that they cannot be explicitly called. Lastly, it is not necessary to catch every built-in exception in a try-except block; it is up to the programmer’s discretion to handle exceptions based on the specific requirements of their applications.