The correct option is A One day, when he had finished the ivory statue of a beautiful woman, he smiled.
Option A is incorrect because the words do not form any coherent sense. Option B implies that the statue smiled, which is logically impossible, hence wrong. Option C conveys that the completion of the statue is not necessarily conducive to his smile, which is not the actual meaning. Option D means that he could smile because he had finished the statue of a beautiful woman. Therefore, it is correct.