Answer:
In the very first scene, the witches chant "Fair is foul, and foul is fair." This is foreshadowing on several levels. First of all, they are foreshadowing the unnatural events that are going to take place in the play, since only something unnatural can be foul and fair at the same time. Secondly, they are foreshadowing Macbeth's exterior versus his interior and how that will change through the play. He will become fair on the outside but foul on the inside when he welcomes Duncan into his home while planning to murder him. -MsLit
Answer: Prior to
Explanation: Picking "prior to" is basiclly saying do this and this BEFORE you leave the house. While as after is once you leave the house do all of thoes things which wouldn't make sense.
