Which of the following is NOT a reason Laertes is a foil to Hamlet?

Spied on by Polonius

Experience the death of Ophelia

Confides in Claudius

Grieve the loss of a father

I believe that A), spied on by Polonius, is NOT a reason Lawrtes is a foll to Hamlet.

Given that Laertes was never spied on by Polonius, that is the correct answer here. Polonius spied on Hamlet, not Laertes, and he died because of that. Laertes did feel sad about his sister's death, he did confide in Claudius, and he did grieve the loss of his father, Polonius.