Answer;
The event in Act IV that foreshadows Macbeth's eventual down fall is that;
Macduff discovers Macbeth has murdered his family and vows to kill Macbeth himself. <span>This is used to foreshadow an imminent conflict between Macbeth and Macduff.</span>
Explanation;
Foreshadowing is the use of indicative word or phrases and hints that set the stage for a story to unfold and give the reader a hint of something that will happen without revealing the story, or interfering with suspense.
if i had a chance to change the past i would because iv made a lot of mistakes in my life and if i could fix them it would make the man i am now a lot better and i could make my family proud and i could start over and thats what a lot of people want and thats a second chance .
macbeth has doubts on killing duncan and doesnt want to.
D is definitely the correct answer. Hope this helps :)<span />