Answer:
a. Polonius's death deepens the conflict between Hamlet and King Claudius.
d. Polonius's death contributes to Ophelia's madness.
e. Polonius's death causes Laertes to return to Denmark to get revenge.
Step-by-step explanation:
The death of Polonius is an event that moves the plot of the play forward. This event deepens the conflict between Hamlet and King Claudius because it shows the king that getting rid of Hamlet is urgent. It also contributes to Ophelia's madness, eventually leading to her death. Finally, Polonius's death causes Laertes to return to Denmark to get revenge.