To really beautifully portray the emotion of the story/meaning that he is telling.
Answer:
by the stock of superlatives the author means the group of people who were superlative or of high post or standard in the audience.
And the sentence means that the person exhausted or astonished the minds of his audience that even the superlatives were surprised by his lecture and was....as said the first after Desmond Tutu in 2008 to get a standing ovation or the highest standard of applause to him.
For the first question try Answer choice A
