A nurse is instructing a pregnant patient concerning the potential risk to her fetus from a Pregnancy Category B drug. The nurse would inform the patient that:

Animal studies have not demonstrated a risk to the fetus, but there have been no adequate studies in pregnant women.

Adequate studies in pregnant women have demonstrated there is no risk to the fetus.

There is evidence of human fetal risk, but the potential benefits from use of the drug may be acceptable despite potential risks.

Animal studies have shown an adverse effect on the fetus, but there are no adequate studies in pregnant women.