A prologue is defined as the introductory first few lines, paragraphs, or page, to literary works and it is used to focus the reader´s attention on what the work will be about, and how the story originated. In recent literature, the use of prologues has diminished, some authors simply prefering to get right into their chapters without any introductory words. However, in Ancient Greece, especially in drama, the prologue was really important and central, and it was usually characterized by it being delivered as a speech, in verse, that was given by the actors of the play. In fact, the prologue, or prologos as it was known by the Greeks, was so important to Greek drama, that it usually was taken as the introductory first chapter of a work and it was delivered usually by someone of great importance, like a god, who appeared on stage alone, without any additaments, so that all attention from the public was centered on this one orator. And the prologue was always at the beginning of the play, because it was needed for the public to understand the play. This is why the correct answer is the last one: A prologue begins the Greek drama.