The Embryonic Stage of Prenatal Development Is Considered a Critical

The embryonic stage of prenatal development is considered a critical period for development because

A) this is the stage when the gender of the conception is determined.
B) all major organs and structures are undergoing rapid development, and damage done at this point can be both severe and irreversible.
C) the conception may implant in the fallopian tubes rather than in the uterus.
D) most of the genetic abnormalities that we see in infants happen during this stage of prenatal development.