What plan do Claudius and Laertes devise to kill Hamlet?

a) Laertes will challenge Hamlet to a duel and kill him with poison.
b) Claudius will offer Hamlet poisoned wine during a fencing match.
c) Claudius will send assassins to ambush Hamlet in his sleep.
d) Laertes will invite Hamlet to a hunting trip and shoot him with a poisoned arrow.