Which weeks of fertilization/pregnancy define each trimester?
A) 0-12 weeks, 13-26 weeks, 27-40 weeks
B) 1-12 weeks, 13-28 weeks, 29-40 weeks
C) 0-13 weeks, 14-26 weeks, 27-40 weeks
D) 1-13 weeks, 14-27 weeks, 28-42 weeks