A Number of Research Studies Have Shown That There Is

A number of research studies have shown that there is an improvement in postoperative morbidity and mortality then:

A) alpha stimulation is applied for at least 30 minutes before and after surgery
B) infants and children receive general anesthesia and postoperative pain management
C) vitamin C is given to infants and children for a week before and a week after surgery
D) fathers hold and touch their infants before and after surgery