Narrative distance refers to the difference between the character's point of views and the reader's point of view. All the characters in a story exist with some amount of distance between themselves. Close and distant narrative styles simply refer to the amount of distance between the readers and the characters. Hope this helps.
We first need to understand what the Oedipus myth is to determine which of the statements is a fact. According to the play, Oedipus was doomed to kill his father and marry his mother, Because of this, his father ordered him be killed. This did not happen and he was abandoned and discovered by a neighboring king. When he was older, he was told this and fled the city to avoid the prophecy coming true. He meets Laius on the road, kills him, and then goes to Corinth, where he marries Laius' wife Jocasta. At the end of the play, Oedipus discovers that Jocasta is his mother and that he has murdered his father, causing him to pluck his eyes out and be exiled from the city because of his sins. With this in mind, we can say that the first choice, that Lauis and Jocasta are his parents, is the best answer here.
Another term for introduction is an exposition.
exposition: the part of a play or work of fiction in which the background to the main conflict is introduced.
Put a photo up for more explanation.