What Is the Main Difference Between Embryonic and Fetal Development

What is the main difference between embryonic and fetal development?

A) There isn't any real difference.
B) Embryonic development is about growth and in fetal development the major organ systems and structures are organized.
C) Fetal development is mainly about growth after the body systems and structures have mostly all been differentiated during embryonic development.
D) Embryonic development is all about cell differentiation, and fetal development is more organ and structure differentiation.
E) Once an embryo makes it to the fetal development stage, it's likely to survive no matter how early its born.