The answer is: The pause must be used expertly in order to be effective.
According to Mark Twain, the pause is a significant literary element that must be used with proficient knowledge to be adequate. Because it has a subtle meaning, the pause must possess the accurate duration. Otherwise, if it is too long or too short, it is unsuccessful and the text might require a great effort for the reader.
I would go with A) A symbol is an ordinary object that takes on significance outside itself and stands for something greater.
I believe the answer is B) How to determine the difference between right and wrong. Many medieval texts were themed off of this question. They were about great heroes defeating their foes in great battles.
Hope this helps! Please let me know if I'm wrong :)