A nurse is assisting with the admission of a client who is in preterm labor at 30 weeks of gestation and has a new prescription for betamethasone. Which of the following statements should the nurse make?

"The purpose of this medication is to increase the fetal heart rate.".

"The purpose of this medication is to halt cervical dilation.".

"The purpose of this medication is to stop preterm labour contractions.".

"The purpose of this medication is to boost fetal lung maturity.".