The Nurse Reviewing a Medical Record Notes That High Concentrations

The nurse reviewing a medical record notes that high concentrations of methotrexate followed by leucovorin (citrovorum factor, folic acid) are being given to the client with cancer. The nurse correctly interprets that the reason for therapy with leucovorin is to:

A) Preserve normal cells.
B) Promote protein synthesis.
C) Promote medication excretion.
D) Hasten the effect of the methotrexate.