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.
1: she gets arrested
2: she gets disrespected
3: starts a movement
Your supposed to have this in a text or movie because if you reread it you can find the letter and it will tell you everything you need to know.
It's A and C, #platolivesmatter