At a Routine Prenatal Visit,the Nurse Explains the Development of the Fetus

At a routine prenatal visit,the nurse explains the development of the fetus to her client.At approximately ____ weeks of gestation,lecithin is forming on the alveolar surfaces,the eyelids open,and the fetus measures approximately 27 cm crown to rump and weighs approximately 1110g The client is how many weeks of gestation at today's visit?

A) 20
B) 24
C) 28
D) 30