The Parents of a 7-Month-Old Child,being Seen at the Clinic

The parents of a 7-month-old child,being seen at the clinic for the administration of a hepatitis B vaccine,ask if their child be can also be given a vaccine to prevent the chickenpox during this visit.The best response by the nurse is:

A) "It will be less stressful to administer both shots during this visit."
B) "The additional injection will make your child run a fever."
C) "You really should wait and come back next month for this immunization."
D) "This immunization is not offered until after the age of 12 months."