Which of the following points would be most important for the nurse to stress when developing a patient teaching plan for a patient receiving antineoplastic therapy? 

a. The importance of keeping the head covered at extremes of temperature. 

b. The need to use barrier contraceptives because of the risk of serious fetal effects. 

c. The importance of avoiding exposure to infection because the ability to heal or to fight infection is impaired.

d. The importance of avoiding food if nausea or vomiting is a problem. 

e. The importance of avoiding digging in the dirt without protective coverings because of the many pathogens that live in the dirt that could cause infection. 

f. The importance of taking periodic rest periods during the day because you will feel tired when your red blood cell count falls.