All of the following are postsurgical instructions not recommended to the oral surgery patient except: a. using ice for at least 30 minutes on and 30 minutes off during the first 24 hours. b. using a straw and frequent rinsing with a mouthwash during the first 24 hours. c. limiting activities and avoid strenuous work or exercise for a few days. d. applying heat during the first 24 hours to minimize swelling.