The correct answer is letter A: "before the long hours and a half of the prayers and Bible reading was over...."
In the sentence, the writer makes use of several resources which make evident her dissatisfaction with the school practices. Firstly, the writerwas ready to die in the cold before what felt to her as "long hours" passed. Then, thinking of the whole of prayers, she would not want to listen to "half of them". Lastly, Bible reading caused her annoyance which is suggested from the use of "over" instead of more tone-neutral adjectives, e.g. completed.
