18. How can you load classes on demand as they are required by the interpreter?

Вариант ответа 1 - A) By using the __autoload magic function

Вариант ответа 2 - B) By defining them as forward classes

Вариант ответа 3 - C) By implementing a special error handler

Вариант ответа 4 - D) It is not possible to load classes on demand

Вариант ответа 5 - E) By including them in conditional include statements