I think it is e because A dependent clause is a group of words with a subject and a verb. It does not express a complete thought so it is not a sentence and can't stand alone.
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.
Playing among us? Watching Netflix? Doing homework?