A Woman Has Recently Determined That She Is Pregnant, and Her

A woman has recently determined that she is pregnant, and her clinician believes that the conception occurred around 8 weeks prior. Since the embryo is in the third stage of embryonic development, which of the following events and processes in growth and development would be expected to be taking place?

A) Transition from a morula to a blastocyst
B) Ossification of the skeleton and acceleration of body length growth
C) Rapid eye movement and early support of respiration
D) Formation of upper limbs and opening of the eyes