A technician uses an ultrasound to examine a fetus. She observes that the fetus is covered in a fine, downy hair, and that a uterus has formed. She
tells the mother that she is carrying a 15 week old fetus. Why is the
technician wrong?*

A. fine, downy hair does not appear until the 26th week of pregnancy

B. a uterus forms in the fetus in the 9th week of pregnancy

C. both of these features form between weeks 19 and 20 of a pregnancy

D. both of these features form between weeks 15 and 16 of a pregnancy