A child who is receiving methotrexate and undergoing cranial radiation is very weak. Her mother asks the nurse whether she may give her daughter vitamins. How does the nurse respond?
A. "That's an excellent idea. I'll try to get a prescription for her."
B. "Unfortunately, vitamins won't make her feel any better now."
C. "Although I can understand this idea, vitamins interfere with the action of methotrexate."
D. "After we receive the laboratory reports, your daughter will be getting vitamins."