A Woman in Her Second Trimester of Pregnancy Complains of Heartburn

A woman in her second trimester of pregnancy complains of heartburn and indigestion.The nurse should offer which of the following explanations for these problems?

A) Tone and motility of the gastrointestinal tract increase during the second trimester.
B) Sluggish emptying of the gallbladder,resulting from the effects of progesterone,often causes heartburn.
C) Lower blood pressure at this time decreases blood flow to the stomach and gastrointestinal tract.
D) The enlarging uterus and altered esophageal sphincter tone predispose the woman to have heartburn.