A Child Who Is in the First Postoperative Day After

A child who is in the first postoperative day after a tonsillectomy starts to cough and wants to blow his nose. Which of the following actions by the nurse would be best?

A) Offer the child some tissue, and give instructions on its disposal.
B) Remind the child not to cough or blow his nose.
C) Tell him he can cough but not to blow his nose.
D) Inform the child that he can blow his nose but not cough.