At the start of act 5, the gravediggers are discussing the fact that

a: claudius has murdered hamlets father
b: laertes has returned to denmark from france
c: ophelia has apparently committed suicide
d: hamlet is only feigning madness

C: Ophelia has apparently committed suici.e is the correct answer.

Explanation:

The Tragedy of Hamlet, Prince of Denmark was written by English poet William Shakespeare and it narrates the things that happened after Hamlet's father was gone.

At the beginning of act 5, the gravediggers discuss the apparent suici.e committed by Ophelia, this can be inferred by readers when the first gravedigger said "Is she to be buried in Christian burial that/willfully seeks her own salvation?" in reference to the facts that close the previous act, where Laertes is told about her sister's death, which looks like a suici.e that is also a sin that denied her own salvation.

in ray bradbury's short story "a sound of thunder", mr. eckels's fearfulness leads to drastic consequences for the rest of the world.

in the story, mr. eckels, who is a hunter, hires a time travel company to travel to the age of dinosaurs. although he is excited for the hunting expedition at the beginning, when they reach there and mr. eckels sees the tyrannosaurus, he feels frightened. as he is afraid of the tyrannosaurus, he steps off the path although he has been warned not to do it. by stepping off the path, the entire course of the future is affected: mr. eckart alters the future by stepping on a butterfly, which causes a new man to be elected president in the future. in that way, it is mr. eckart's fearfulness what triggers 'the butterfly effect' and what leads to drastic consequences for the rest of the world.