During a Routine Clinic Visit, a Pregnant Woman Expresses Concern

During a routine clinic visit, a pregnant woman expresses concern about reflux she is experiencing.Which statement should be made by the nurse when addressing the woman's concern?

A) "Frequent heartburn may be a sign of fetal distress and an ultrasound should be performed immediately."
B) "Frequent heartburn is caused by high levels of hormones during pregnancy."
C) "Frequent heartburn is a result of gastrointestinal system changes that occur during pregnancy."
D) "Frequent heartburn during pregnancy requires immediate consultation with a gastroenterologist."