In Act 3 Scene 1, Hamlet gives his famous To Be or Not To Be speech. He says:

To sleep, perchance to dream—ay, there’s the rub,
For in that sleep of death what dreams may come
When we have shuffled off this mortal coil,
Must give us pause.

What is the "rub" Hamlet refers to in the underlined and bolded section of the speech above?

A. If death is like sleep, the dreams may not be pleasant

B. If death is like sleep, one need not worry about dreams.

C. Death is not like sleep

D. People who rush into death also rush into sleep

Please help im stuck on this one