Very preterm infants are born before ____ weeks while preterm infants are born before _____ weeks, and early-term infants are born b/w _____ and _____ weeks of pregnancy.
a) 28; 37; 37; 39
b) 28; 36; 37; 38
c) 32; 36; 37; 38
d) 32; 37; 38; 39