The answer is B: General Reckoning. The phrase in the excerpt that uses the word <em>reckoning</em>, refers to the <em>judgement of God</em>, becasuse the meaning of this word is of the <em>final judgement</em>, and<em> </em><em>general</em> means that it is for every human soul, that will be before God on that <em>Reckoning Day</em>, when "y<em>e shall hear, how our heavenly king calleth everyman to a general reckoning"</em>
This quote can be found only in the movie. It can be heard in the third movie, and is told by the headmaster. I just checked the book, and it doesn't appear there.