The correct option is this: A WORK THAT TEACHES A LESSON THROUGH THE USE OF ALLEGORICAL CHARACTERS.
Morality play is a type of play which make use of allegorical characters who have personified abstract qualities. Such play were popular in the 15th and the 16th centuries and their normal contents is typically lessons about good conductors and characters.
He starts with his own account of the climb. However, he only does it with a few sentences, and then, as soon as he mentions the breathing problems, he proceeds with explaining how Hillary's account was not completely accurate. At the very beginning, the reader gets to understand that this text's purpose is not to describe the climb, but to supplement (or correct) another person's account.
