Dramatic irony is when the audience are aware of something, but the characters don't. For example, In Shakespeare's <em>Macbeth, </em>Duncan is talking about how Macbeth is so great. We know that Macbeth is actually planning to kill Duncan, but Duncan himself doesn't know this.
I believe your answer would be D. Taking into consideration that the genre features short texts, while still including all of the features of a full length story. :)
He spend 1hr 85 or 1.85 hours per day