Answer:
I strongly believe that this questions answer is B
Explanation: When we talking about the past we must say that a lot of vocabulary are changed. Because thanks to time we forgot same vocabulary. We need to check a usage dictionary and a dictionary to get vocabulary which one used in the past. Some words means are same and some words look like same but they haven't same means for this we should check dictionary.
The best answer would be C) Reference section because if I were to walk in a library (which I have) I don't see encyclopedias in the fiction section cuz encyclopedias are REAL not fake, and an encyclopedia is NOT a biography book, and its not fiction either so its in the reference section.
You should think about a time where someone sacrificed something for you. For example: your parents.
Breathe deeply and think positively. Breathing deeply will help to calm his nerves and clear his mind and help him to compose himself and thinking positively will allow him to see how he has been successful and what are the reasons for his success to share with the audience and realizing that since it is impromptu the audience will probably be more forgiving than if he had a prepared speech.